| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 2155 |
90.9%
|
| 2 | 7 years old or younger | 49 |
2.1%
|
| 3 | 8 or 9 years old | 43 |
1.8%
|
| 4 | 10 or 11 years old | 30 |
1.3%
|
| 5 | 12 or 13 years old | 35 |
1.5%
|
| 6 | 14 or 15 years old | 42 |
1.8%
|
| 7 | 16 or 17 years old | 15 |
0.6%
|
| 8 | 18 years old or older | 1 |
0%
|
| Sysmiss | 138 |