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7Eat offen2017ANNUAL REPORT OF THECALIFORNIA DUI MANAGEMENTINFORMATION SYSTEMANNUAL REPORT TO THE LEGISLATUREOF THE STATE OF CALIFORNIAIN ACCORDANCE WITH ASSEMBLY BILL 757CHAPTER 450, 1989 LEGISLATIVE SESSIONEDMUND G. BROWN JR.GovernorBRIAN C. ANNIS, SecretaryCalifornia State Transportation AgencyJEAN SHIOMOTODirector California Department of Motor Vehicles, 2018
Form ApprovedREPORT DOCUMENTATION PAGEOMB No. 0704-0188Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching data sources, gathering and maintaining thedata needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions forreducing this burden to Washington Headquarters Service, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Officeof Management and Budget, Paperwork Reduction Project (0704-0188) Washington, DC 20503.1. REPORT DATE (DD-MM-YYYY)October 20182. REPORT TYPE3. DATES COVERED (From - To)Final Report4. TITLE AND SUBTITLE2017 Annual Report of the California DUI Management Information System6. AUTHOR(S)Sladjana Oulad Daoud, Helen N. Tashima7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)California Department of Motor VehiclesResearch and Development BranchP.O. Box 932382Sacramento, CA 94232-38205a. CONTRACT NUMBER5b. GRANT NUMBER5c. PROGRAM ELEMENT NUMBER5d. PROJECT NUMBER5e. TASK NUMBER5f. WORK UNIT NUMBER8. PERFORMING ORGANIZATIONREPORT NUMBERCAL-DMV-RSS-18-2579. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)10. SPONSOR/MONITOR'SACRONYM(S)11. SPONSORING/MONITORINGAGENCY REPORT NUMBER12. DISTRIBUTION AVAILABILITY STATEMENT13. SUPPLEMENTARY NOTES - Correspondingauthor: [email protected]. ABSTRACTIn this twenty-sixth annual legislatively-mandated report, 2014 and 2015 driving under the influence ofalcohol and/or drugs (DUI) data from diverse sources were compiled and cross-referenced for the purpose ofdeveloping a single comprehensive DUI data reference and monitoring system. This report presents crosstabulated information on DUI arrests, convictions, postconviction sanctions, driver licensesuspension/revocation actions, and on drivers in alcohol- or drug-involved crashes. In addition, this reportprovides 1-year proportions of DUI recidivism and crash rates for first and second DUI offenders arrested ineach year over a time period of 25 years. Also, the long-term recidivism curves of the cumulative proportionsof DUI reoffenses are shown for all DUI offenders arrested in 2005. An analysis was conducted to evaluateif referrals to the 9-month DUI program were associated with reductions in 1-year subsequent DUI incidentsand crashes when compared to referrals to the 3-month DUI program among first DUI offenders. Theproportions of convicted first and second DUI offenders arrested in 2014, who were referred, enrolled, andcompleted DUI programs are also presented. Additionally, the numbers and percentages of DUI offenderswho installed ignition interlock devices are presented by county and DUI offender status.15. SUBJECT TERMSDrinking drivers, DUI tracking data system, DUI reporting system, DUI countermeasures, DUI recidivism,DUI Program, license suspension/revocation, drugged driving, ignition interlock17. LIMITATIONOF ABSTRACT16. SECURITY CLASSIFICATION OF:UnclassifiedA. REPORTUnclassifiedB. ABSTRACTUnclassifiedNSN 7540-01-280-5500C. THIS PAGEUnclassifiedNone18. NUMBEROF PAGES16819a. NAME OF RESPONSIBLE PERSONKarin Oakley19b. TELEPONE NUMBER (Include area code)916-657-5768Standard Form 298 (8-98)Prescribed by ANSI Std. Z39-18
DUI SUMMARY STATISTICS: 2005- 20152005200620072008DUI measuresDUI arrest rate (per 100,000licensed drivers)Total DUI arrestsaFelony DUI arrestsaMisdemeanor DUI 1976022148115966208845Total DUI ol- or drug-involved recklessdriving convictionscPercent convicted of alcohol ordrug reckless 311.2786849863906880iAlcohol-involved crash fatalitiese% of total crash fatalitiesAlcohol-involved crash injuriese% of total crash injuriesDrug-involved crash fatalitiesf% of total crash fatalitiesDrug-involved crash injuriesf% of total crash injuries2015DUI SUMMARY STATISTICS: 2005-2014DUI conviction ratesc20092017 DUI-MIS REPORTNote: N/A indicates that this information is not available yet for 2015.aThese totals do not include duplicate cases as originally reported in the Department of Justice, Criminal Justice Statistics Center data.bDue to the underreporting of DUI arrest data by CHP for the month of April 2011, the total for 2011 is undercounted by approximately 6,500 DUI arrests.cThese figures show the total counts of convictions and conviction rates, by year of violation, as typically reported in Section 2 of this report.dThe 2010 and later DUI conviction rates and percent convicted of alcohol-reckless driving are derived using different data extraction procedures than those used in years prior to2010 and are not comparable to figures in those prior years. These rates are computed only on “matchable DUI cases”, and not by using total DUI arrests divided by total DUIconvictions presented in this table. See Section 2 for more details.eFor some fatalities in these figures, drugs were also involved. These figures were provided by CHP on February 21, 2018.fFor some fatalities in these figures, alcohol was also involved. These figures were provided by CHP on February 21, 2018.
iiDUI license actionsTotal mandatory suspension/revocation (S/R) actionsPRECONVICTIONAdmin Per Se (APS) Actions.01 Zero tolerance suspensions.08 First-offender suspensions.08 Repeat-offender suspensions.08 Repeat-offender revocationsCommercial driver actionsChemical test refusal actions.01 Test refusal suspensions.08 Test refusal suspensions.08 Test refusal revocationsPOSTCONVICTIONhJuvenile DUI suspensionsFirst-offender suspensionsMisdemeanorFelonySecond-offender S/R actionsMisdemeanorFelonyThird-offender rrevocationsTotal postconvictionS/R vious counts have been adjusted to include commercial driver APS actions not previously identified as such.hThese totals might include multiple license action activities associated with the same event. Total counts for 2006 and later increased as a result of a law change, effective09/20/2005. This law assigned to DMV the sole responsibility for imposing license actions for all DUIs and removed this responsibility from the courts.2017 DUI-MIS REPORTDUI SUMMARY STATISTICS: 2005– 2015 (CONTINUED)
2017 DUI-MIS REPORTHIGHLIGHTS OF YEAR 2017 CALIFORNIA DUI-MIS REPORTBackgroundThe California DUI Management Information System was developed in California in 1989 as aresult of the legislative mandate that required the development of a monitoring system to evaluatethe efficacy of intervention programs for persons convicted of DUI in California.The California Legislature recently enacted substantial changes to the laws governing drivingunder the influence (DUI) of alcohol and/or drugs. Senate Bill 1046 (Hill), which was signed byGovernor Brown in September of 2016, will (among other provisions) require that all repeat DUI(alcohol) offenders, and first offenders whose offense involved an injury, install an ignitioninterlock device (IID) for a specified period of time as a condition of the reinstatement of theirdriving privilege. The provisions of this law will commence on January 1, 2019. It is thereforeexpected that the full effects of this law on traffic safety measures (such as recidivism) will becomeknown subsequent to that date.The annual report of the California DUI Management Information System provides current andcomprehensive statistics on the processing of DUI offenders from the point of arrest throughadjudication to treatment and license control actions. The report presents cross-tabulatedinformation on DUI arrests, convictions, postconviction sanctions, administrative license actions,and on drivers in crashes involving alcohol and drugs. In compliance with provisions of the law,the efficacy of specific sanctions and their results are also included in the report. Specifically, aseparate analysis was conducted to evaluate if referrals to the 9-month DUI program wereassociated with reductions in 1-year subsequent DUI incidents and crashes when compared toreferrals to the 3-month DUI program among first DUI offenders. The report is divided into sixsections with each section covering specific topics of the report. The following are highlights fromeach section of the 2017 report reflecting on the current state of DUI in California.DUI Summary Statistics Alcohol-involved crash fatalities decreased by 1.0% in 2015, following a decrease of 3.5% in2014 (see DUI Summary Statistics). Drug-involved crash fatalities decreased by 3.8% in 2015, after a decrease of 3.1% in 2014.iii
2017 DUI-MIS REPORT Of the total number of crash fatalities in 2015, 33.3% were alcohol-involved, which is lowerthan the 36.9% in 2014. The percentage of drug-involved fatalities decreased from the prioryear’s 27.6% to 24.2% in 2015. In 2015, 9.9% of total crash injuries were alcohol-involved; slightly lower than 10.4% reportedfor 2014. The DUI arrest rate per 100,000 licensed drivers declined by 11.8% in 2015, following adecline of 4.9% in 2014.Section 1: DUI Arrests DUI arrests decreased by 8.6% in 2015, following decreases of 3.5% in 2014 and 7.2% in 2013(see DUI Summary Statistics and Table 1). The median (midpoint) age of a DUI arrestee in 2015 was 31 years and almost three-quarters(72.4%) of arrestees were age 40 or younger. Less than one percent (0.4%) of all DUI arrestswere of juveniles (under age 18) and 3.6% were of drivers over age 60. This is shown inTable 3a. Males comprised 77.4% of all 2015 DUI arrests, slightly higher than the 76.9% in 2014 (seeTable 3a). The proportion of females among DUI arrests has risen from 10.6% in 1989 to22.6% in 2015. Based on data from the Department of Justice (DOJ), among 2015 DUI arrestees, Hispanics(47.2%) were the largest racial/ethnic group, as they have been each year for over a decade.Hispanics continued to be arrested at a rate substantially higher than their estimated percentageof California’s adult population (36.0% in 2015). This is shown in Figure 3.Section 2: Convictions 72.7% of 2014 DUI arrests resulted in convictions for DUI offenses (see Table 6). Among convicted DUI offenders arrested in 2014, 73.1% were first offenders and 26.9% wererepeat offenders (one or more prior convictions within the previous 10 years), identical to 2013percentages. The proportion of repeat offenders has decreased considerably since 1989, whenit stood at 37%, even though prior DUI convictions are currently retained on record and thusiv
2017 DUI-MIS REPORTcounted longer than in the past (10 years compared to 7 years in 1989). This is shown inTable 8. The median blood alcohol concentration (BAC) of a convicted DUI offender, as reported bylaw enforcement on Administrative Per Se (APS) forms, was 0.16% in 2014, which is doublethe California illegal per se BAC limit of 0.08% (see Table 7a). In 2014, 17.0% of DUI arrest cases did not show any corresponding conviction on DMVrecords, up 3.7% from 2013 (see Table 6).Section 3: Postconviction Sanctions The most frequent court sanction for all convicted DUI offenders was probation (96.5%), whilethe least frequently imposed court sanction was ignition interlock (6.6%). DUI offenders weresentenced to jail in 73.5% of the cases (see Table 9). Among first DUI offenders arrested in 2014, 65.3% were sentenced to jail, compared to 95.7%of all repeat offenders (see Table 9). Among first DUI offenders, 92.0% were ordered by courts to complete DUI programs, as were88.8% of second offenders, 77.4% of third offenders, and 44.5% of fourth-or-more DUIoffenders (see Table 9).Section 4: Postconviction Sanction Effectiveness The 1-year DUI reoffense rate for first DUI offenders arrested in 2014 was 3.7% compared to7.6% in 1990. The 1-year reoffense rate for second DUI offenders was 4.7% compared to9.7% in 1990. Each of these represents slightly over 50% fewer reoffenses compared to thatof 1990 arrestees (see Figure 6 and Table 11a). Long-term reoffense rates, those occurring over years following an initial DUI conviction, arehigher among those with more DUI priors (within 10 years), among males, and amongyounger-aged drivers (see Figures 8b, 8c, and 8d). Of the DUI offenders arrested in 2014 who, by court order, enrolled in a DUI program, 87.3%of first offenders and 41.2% of second offenders completed their program assignment (seeTable 13).v
2017 DUI-MIS REPORTSection 5: License Suspension/Revocation Actions The total number of both DMV APS and DUI postconviction suspension or revocation actionsdecreased by 3.6% in 2015, continuing the trend of the prior 6 consecutive years (see Table 15). In 2015, 130,468 APS license actions were taken. Of these actions, 73.6% were first-offenderactions (including “zero tolerance” actions taken for drivers under age 21) and 26.4% wererepeat-offender actions (see Table 15).Section 6: Drivers in Crashes Involving Alcohol and Drugs While the number of alcohol-involved fatalities declined by 15% over the past 20 years, thenumber of drug-involved fatalities increased by 212% over the same time period. Some of theincrease in the number of fatalities reported as drug-involved over this time period may be, inpart, associated with an increase in training and ability of California law enforcement to detectand report drug involvement in fatal crashes in recent years (see Figure 11). Of all 2014 DUI arrests, 15.3% were associated with a reported traffic crash, compared to14.4% in 2013. Of 2014 DUI arrests, 6.0% of them were associated with crashes involvinginjuries or fatalities, slightly higher than the 5.6% in 2013 (see Table 17). In 2014, over three-fourths (77.5.0%) of drivers in alcohol- and drug-involved fatal crasheshad no prior DUI or alcohol- or drug-related reckless driving conviction (see Table 24a). Incontrast, almost two-thirds (61.5%) of drivers in alcohol- and drug-involved injury crashes hadat least one prior DUI or alcohol- or drug-related reckless driving conviction (see Table 24a).vi
2017 DUI-MIS REPORTACKNOWLEDGMENTSThe authors acknowledge with appreciation the many individuals who have contributed to thesuccess of this project. In particular, we wish to acknowledge the cooperation of the Departmentof Justice, Criminal Justice Statistics Center, for providing annual DUI arrest data anddocumentation, as well as the California Highway Patrol, Information Management Division, forproviding annual alcohol- and drug-involved crash data and documentation. The contributions ofDouglas Rickard, Associate Governmental Program Analyst, in transforming computer files intoreadable data tables and figures, as well as his general assistance in the production of this report,are acknowledged with appreciation. Further, we acknowledge, with great appreciation, thecontributions of Ainsley Mitchum, Research Manager II, for information presented in section 5 ofthis report. We also would like to acknowledge the contributions of Michael Gebers, ResearchScientist III; Patrice Rogers, Research Manager II, Alcohol/Drugs Projects; and Bayliss J. Camp,Chief, Research and Development Branch.Report Authors:Sladjana Oulad Daoud, Research Program Specialist II, andHelen N. Tashima, Retired Annuitant, Principle Investigators.vii
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2017 DUI-MIS REPORTTABLE OF CONTENTSPAGEDUI SUMMARY STATISTICS: 2005-2015 . iHIGHLIGHTS OF YEAR 2017 CALIFORNIA DUI-MIS REPORT . iiiACKNOWLEDGMENTS . viiINTRODUCTION . 1DATA SOURCES AND LIMITATIONS . 5SECTION 1: DUI ARRESTS . 7SECTION 2: CONVICTIONS . 15SECTION 3: POSTCONVICTION SANCTIONS . 25SECTION 4: POSTCONVICTION SANCTION EFFECTIVENESS . 45DUI RECIDIVISM AND CRASH RATES . 48One-Year DUI Recidivism and Crash Rates for First and Second DUI OffendersArrested from 1990-2014 . 48One-Year DUI Recidivism and Crash Rates by County for First and Second DUIOffenders Arrested in 2014 . 51Long Term Recidivism Rates of the 2005 DUI Offenders . 54The Proportions of DUI Program Referrals, Enrollments, and Completions forFirst and Second DUI Offenders Arrested in 2014 . 60DUI PROGRAM EVALUATION FOR ALCOHOL- OR DRUG-RELATEDRECKLESS OFFENDERS AND FIRST DUI OFFENDERS . 60Methods . 60DUI Program Evaluation for Drivers Convicted of Alcohol- or Drug-RecklessDriving . 639-Month DUI Program Evaluation for Repeat Alcohol- or Drug-RelatedReckless Drivers . 63Results of the Evaluation of 3-Month and 9-Month DUI Programs for First DUIOffenders . 63SECTION 5: LICENSE SUSPENSION/REVOCATION ACTIONS . 67SECTION 6: DRIVERS IN CRASHES INVOLVING ALCOHOL AND DRUGS . 71REFERENCES . 83ix
2017 DUI-MIS REPORTTABLE OF CONTENTS (continued)APPENDICESNUMBERPAGEA HISTORY OF MAJOR DUI LAWS IN CALIFORNIA SINCE 1975 . 87GLOSSARY . 102ASSEMBLY BILL NO. 757 - CHAPTER 450 . 105B APPENDIX TABLES . 107B1 2015 DUI ARRESTS BY COUNTY, AGE, GENDER AND RACE/ETHNICITY. 107B2 2014 DUI CONVICTIONS BY COUNTY, GENDER, AND AGE . 122B3 DUI CONVICTION DATA FOR 2014 DUI ARRESTS BY COURT . 133B4 COURT SANCTIONS BY COUNTY, COURT, AND DUI OFFENDERSTATUS FOR DUI OFFENDERS ARRESTED IN 2014 . 142B5 DEMOGRAPHIC 2-YEAR PRIOR DRIVER RECORD VARIABLES FORFIRST DUI OFFENDERS ARRESTED IN 2014 . 168LIST OF TABLES1DUI ARRESTS BY COUNTY, 2013–2015 AND ANNUAL PERCENTAGECHANGE, 2014–2015 . 1122015 DUI ARRESTS BY COUNTY AND TYPE OF ARREST. 123a 2015 DUI ARRESTS BY AGE, GENDER, AND RACE/ETHNICITY . 133b2015 DUI ARRESTS BY GENDER, AGE, AND RACE/ETHNICITY . 133c DUI ARRESTS UNDER AGE 21, 2005-2015 . 144DUI CONVICTIONS BY AGE AND GENDER FOR 2014 DUI ARRESTS . 195DUI CONVICTION DATA FOR 2014 DUI ARRESTS . 206ADJUDICATION STATUS OF 2014 DUI ARRESTS BY COUNTY . 217a REPORTED BLOOD ALCOHOL CONCENTRATION (BAC) LEVELS OF DUIAND ALCOHOL- OR DRUG-RECKLESS CONVICTIONS FOR 2014 DUIARRESTS . 22x
2017 DUI-MIS REPORTTABLE OF CONTENTS (continued)LIST OF TABLES (continued)NUMBERPAGE7bREPORTED BLOOD ALCOHOL CONCENTRATION (BAC) LEVELS OFCONVICTED DUI OFFENDERS UNDER AGE 21 ARRESTED IN 2014 . 238DUI CONVICTIONS BY DUI OFFENDER STATUS AND REPORTED BACLEVEL FOR 2014 DUI ARRESTS . 239a COURT SANCTIONS BY DUI OFFENDER STATUS FOR DUI OFFENDERSARRESTED IN 2014 . 269bIGNITION INTERLOCK DEVICE INSTALLATIONS BY DUI OFFENDERSTATUS FOR DUI OFFENDERS ARRESTED IN 2014 . 2810a COURT SANCTIONS BY COUNTY AND DUI OFFENDER STATUS FOR DUIOFFENDERS ARRESTED IN 2014 . 3010b IGNITION INTERLOCK DEVICE (IID) INSTALLATIONS BY COUNTY ANDDUI OFFENDER STATUS FOR DUI OFFENDERS ARRESTED IN 2014 . 3711a ONE-YEAR UNADJUSTED PERCENTAGES OF SUBSEQUENT DUIINCIDENT-INVOLVED AND CRASH-INVOLVED FIRST AND SECONDOFFENDERS, 1990-2014 . 4911b 2014 1-YEAR SUBSEQUENT DUI RECIDIVISM RATES BY COUNTY FORFIRST AND SECOND OFFENDERS . 5211c 2014 1-YEAR SUBSEQUENT CRASH RATES BY COUNTY FOR FIRST ANDSECOND OFFENDERS . 5312CUMULATIVE PERCENTAGES OF FIRST SUBSEQUENT DUI REOFFENSESFOR 2005 DUI OFFENDERS AND COHORT GROUPS . 5413COUNTS AND PROPORTIONS OF REPORTED DUI PROGRAM REFERRALS,ENROLLMENTS, AND COMPLETIONS FOR CONVICTED FIRST ANDSECOND OFFENDERS ARRESTED IN 2014 . 6014THE RELATIONSHIP OF 3-MONTH AND 9-MONTH DUI PROGRAMS WITHSUBSEQUENT CRASHES AND DUI INCIDENTS AMONG FIRST DUIOFFENDERS ARRESTED IN 2014. 65xi
2017 DUI-MIS REPORTTABLE OF CONTENTS (continued)LIST OF TABLES (continued)NUMBERPAGE15MANDATORY DUI LICENSE DISQUALIFICATION ACTIONS, 2005-2015 . 6916ADMINISTRATIVE PER SE PROCESS MEASURES . 7017DUI ARRESTS ASSOCIATED WITH REPORTED CRASHES, 2004-2014 . 76182014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY RACE/ETHNICITY AND IMPAIRMENT TYPE . 77192014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY ADJUDICATION STATUS AND IMPAIRMENT TYPE . 77202014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY COUNTY AND IMPAIRMENT TYPE . 7821ALCOHOL-INVOLVED DRIVERS UNDER AGE 21 IN FATAL/INJURYCRASHES, 2004-2014 . 7922a 2014 ALCOHOL-INVOLVED DRIVERS IN FATAL/INJURY CRASHES BYAGE AND GENDER . 7922b 2014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY AGE AND GENDER (NEITHER SUSPENDED UPON ARRESTNOR CONVICTED) . 7923a 2014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY IMPAIRMENT TYPE AND PRIOR DUI CONVICTIONS . 8023b 2014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY IMPAIRMENT TYPE AND PRIOR DUI CONVICTIONS(NEITHER SUSPENDED UPON ARREST NOR CONVICTED) . 8024a 2014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY PRIOR DUI CONVICTIONS . 81xii
2017 DUI-MIS REPORTTABLE OF CONTENTS (continued)LIST OF TABLES (continued)NUMBERPAGE24b 2014 ALCOHOL- AND DRUG-INVOLVED DRIVERS IN FATAL/INJURYCRASHES BY PRIOR DUI CONVICTIONS (NEITHER SUSPENDED UPONARREST NOR CONVICTED) . 81252014 REPORTED BLOOD ALCOHOL CONCENTRATION (BAC) LEVELS OFALCOHOL- AND DRUG- INVOLVED DRIVERS IN FATAL/INJURYCRASHES . 82LIST OF FIGURES1DUI management information system . 22DUI arrests, 2005-2015 . 83Percentage of 2015 DUI arrests and 2015 projected population (age 15 and over,based on the 2010 census) by race/ethnicity . 104DUI convictions and conviction rates based on arrest year, 2005-2014. 175Percentage representation of court-ordered DUI sanctions (for 2014 DUI arrests) . 266Percentages of first and second DUI offenders reoffending with a DUI incidentwithin 1 year after conviction (arrested between 1990 and 2014) . 487Percentages of first and second DUI offenders involved in a crash within 1 year afterconviction (arrested between 1990 and 2014). 508a Cumulative percent of first subsequent DUI conviction and DUI incident (alcoholcrashes, DUI convictions, APS suspensions, and DUI FTAs) for 1994 and 2005 DUIoffenders . 558bCumulative percent of first subsequent DUI conviction by number of prior DUIconvictions for the 2005 DUI offenders . 568c Cumulative percent of first subsequent DUI conviction by gender for the 2005 DUIoffenders . 57xiii
2017 DUI-MIS REPORTTABLE OF CONTENTS (continued)LIST OF FIGURES (continued)NUMBER8dPAGECumulative percent of first subsequent DUI conviction by age group (age atconviction date) for the 2005 DUI offenders . 588e Cumulative percent of first subsequent DUI reoffense of the 1980, 1984, 1994, and2005 DUI offenders . 589Adjusted 1-year crash and DUI incident rates for first offender drivers (arrested in2014) by length of DUI program.
DUI arrests decreased by 8.6% in 2015, following decreases of 3.5% in 2014 and 7.2% in 2013 (see DUI Summary Statistics and Table 1). The median (midpoint) age of a DUI arrestee in 2015 was 31 years and almost three-quarters (72.4%) of arrestees were age 40 or younger. Less than one percent (0.4%) of all DUI arrests
