List of Tables

2.1 Survey Sample Sizes for All Respondents Aged 12 or Older, by Age Group and Demographic Characteristics: 1999 and 2000

2.2 Survey Sample Sizes for All Respondents Aged 12 or Older, by Age Group and Geographic Characteristics: 1999 and 2000

3.1 Estimated Numbers (in Thousands) of Persons Who First Used Marijuana During the Years 1965 to 1999, Their Mean Age at First Use, and the Annual Incidence Rates of First Use (Per 1,000 Person-Years of Exposure), for All Ages

3.2 Estimated Age-Gender Numbers (in Thousands) of Persons Who First Used Marijuana During the Years 1965 to 1999

3.3 Estimated Numbers (in Thousands) of Persons Who First Used Marijuana During the Years 1965 to 1999, Their Mean Age at First Use, and the Annual Incidence Rates of First Use (Per 1,000 Person-Years of Exposure), by Gender

3.4 Estimated Annual Age-Gender Specific Incidence Rates of First Use (Per 1,000 Person-Years of Exposure) of Persons Who First Used Marijuana During the Years 1965 to 1999

3.5 Estimated Numbers (in Thousands) of Persons Who First Used Marijuana During the Years 1965 to 1999, by Racial/Ethnic Subgroups

3.6 Estimated Mean Ages at First Use of Persons Who First Used Marijuana During the Years 1965 to 1999, by Racial/Ethnic Subgroups

3.7 Estimated Annual Incidence Rates of First Use (Per 1,000 Person-Years of Exposure) of Persons Who First Used Marijuana During the Years 1965 to 1999, by Racial/Ethnic Subgroups

4.1 Estimated Numbers (in Thousands) of Average Annual Marijuana Initiates, by Age Group and State: 1999 and 2000

4.2 Average Annual Rates of First Use of Marijuana, by Age Group and State: 1999 and 2000

5.1 Characteristics of Recent Marijuana Initiates

5.2 Prior Alcohol and Cigarette Use among Recent Marijuana Initiates

5.3 Distribution of Month of First Marijuana Use among Persons Aged 12 or Older

5.4 Adjusted Odds Ratios of Marijuana Initiation Within 1 Year among Persons Aged 12 to 25

5.5 Adjusted Odds Ratios of Marijuana Initiation Within 1 Year among Persons Aged 12 to 14

5.6 Adjusted Odds Ratios of Marijuana Initiation Within 1 Year among Persons Aged 15 to 17

5.7 Adjusted Odds Ratios of Marijuana Initiation Within 1 Year among Persons Aged 18 to 20

5.8 Adjusted Odds Ratios of Marijuana Initiation Within 1 Year among Persons Aged 21 to 25

6.1 Percentages with Lifetime and Past Year Use of Heroin, Cocaine, and Psychotherapeutics among Adults Aged 26 or Older, by Age at First Marijuana Use and Age Groups: 1999 and 2000

6.2 Percentages with Past Year Heavy Marijuana Use and Heavy Use of Other Illicit Drugs among Adults Aged 26 or Older, by Age at First Marijuana Use and Age Groups: 1999 and 2000

6.3 Percentages with Past Year Alcohol and/or Illicit Drug Dependence or Abuse among Adults Aged 26 or Older, by Age at First Marijuana Use and Age Groups: 2000

6.4 Adjusted Odds Ratios of Lifetime Use of Heroin, Cocaine, and Psychotherapeutics among Lifetime Marijuana Users Aged 26 or Older: 1999 and 2000

6.5 Adjusted Odds Ratios of Past Year Use of Heroin, Cocaine, and Psychotherapeutics among Lifetime Marijuana Users Aged 26 or Older: 1999 and 2000

6.6 Adjusted Odds Ratios of Past Year Heavy Marijuana Use and Heavy Use of Other Illicit Drugs among Lifetime Marijuana Users Aged 26 or Older: 1999 and 2000

6.7 Adjusted Odds Ratios of Past Year Illicit Drug Dependence or Abuse and Alcohol or Illicit Drug Dependence or Abuse among Lifetime Marijuana Users Aged 26 or Older: 2000

6.8 Adjusted Odds Ratios of Past Year Alcohol Dependence and Illicit Drug Dependence among Lifetime Marijuana Users Aged 26 or Older: 2000

6.9 Adjusted Odds Ratios of Past Year Marijuana Dependence and Other Illicit Drug Dependence among Lifetime Marijuana Users Aged 26 or Older: 2000

6.10 Percentages with Past Year Alcohol and/or Illicit Drug Dependence or Abuse among Past Year Marijuana Users Aged 26 or Older, by Age at First Marijuana Use: 2000

6.11 Adjusted Odds Ratios of Illicit Drug Dependence or Abuse and Alcohol or Illicit Drug Dependence or Abuse among Lifetime Marijuana Users Aged 26 or Older Who Also Used Marijuana in the Past Year: 2000

6.12 Adjusted Odds Ratios of Past Year Alcohol Dependence and Illicit Drug Dependence among Lifetime Marijuana Users Aged 26 or Older Who Also Used Marijuana in the Past Year: 2000

6.13 Adjusted Odds Ratios of Past Year Marijuana Dependence and Other Illicit Drug Dependence among Lifetime Marijuana Users Aged 26 or Older Who Also Used Marijuana in the Past Year: 2000

3.3S Standard Errors of Estimated Numbers (in Thousands) of Persons Who First Used Marijuana During the Years 1965 to 1999, Their Mean Age at First Use, and the Annual Incidence Rates of First Use (Per 1,000 Person-Years of Exposure), by Gender

3.4S Standard Errors of Estimated Annual Age-Gender Specific Incidence Rates of First Use (Per 1,000 Person-Years of Exposure) of Persons Who First Used Marijuana During the Years 1965 to 1999

3.5S Standard Errors of Estimated Numbers (in Thousands) of Persons Who First Used Marijuana During the Years 1965 to 1999, by Racial/Ethnic Subgroups

3.6S Standard Errors of Estimated Mean Ages at First Use of Persons Who First Used Marijuana During the Years 1965 to 1999, by Racial/Ethnic Subgroups

3.7S Standard Errors of Estimated Annual Incidence Rates of First Use (Per 1,000 Person-Years of Exposure) of Persons Who First Used Marijuana During the Years 1965 to 1999, by Racial/Ethnic Subgroups

6.1S Standard Errors and Suppression Rule for Percentages with Lifetime and Past Year Use of Heroin, Cocaine, and Psychotherapeutics among Adults Aged 26 or Older, by Age at First Marijuana Use and Age Groups: 1999 and 2000

6.2S Standard Errors and Suppression Rule for Percentages with Past Year Heavy Marijuana Use and Heavy Use of Other Illicit Drugs among Adults Aged 26 or Older, by Age at First Marijuana Use and Age Groups: 1999 and 2000

6.3S Standard Errors and Suppression Rule for Percentages with Past Year Alcohol and/or Illicit Drug Dependence or Abuse among Adults Aged 26 or Older, by Age at First Marijuana Use and Age Groups: 2000