Table 2: Primary substance of abuse comparisons between 2000 and 2009 cohorts.

2000 ( )2009 ( )*
% %

Primary diagnosis
 Stimulants (amphetamines and cocaine)376.7916910.22
 Cannabis40.73201.21
 Opiates24645.1476646.34
 Alcohol (ETOH)13725.1440224.32
 Other (hallucinogens, sedatives, inhalants, PCP)549.9190.54
 Other drug use and polysubstance dependence6712.2928717.37

 *Three individuals from the 2009 cohort were not assigned a diagnosis.