Source: University of Michigan, Monitoring The Future Studies
| Past Month Crack Use Within Cohort -- Classes of 1995 through 2003 | |||
|---|---|---|---|
| Class of: | 8th Grade | 10th Grade | 12th Grade |
| 1995 | 0.3 | 0.5 | 1.0 |
| 1996 | 0.5 | 0.6 | 1.0 |
| 1997 | 0.4 | 0.9 | 0.9 |
| 1998 | 0.7 | 0.8 | 1.0 |
| 1999 | 0.7 | 0.9 | 1.1 |
| 2000 | 0.8 | 1.1 | 1.0 |
| 2001 | 0.7 | 0.8 | 1.1 |
| 2002 | 0.9 | 0.9 | 1.2 |
| 2003 | 0.8 | 0.7 | 0.9 |