| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 2809 |
86.9%
|
| 2 | 7 years old or younger | 210 |
6.5%
|
| 3 | 8 or 9 years old | 95 |
2.9%
|
| 4 | 10 or 11 years old | 55 |
1.7%
|
| 5 | 12 or 13 years old | 38 |
1.2%
|
| 6 | 14 or 15 years old | 19 |
0.6%
|
| 7 | 16 or 17 years old | 2 |
0.1%
|
| 8 | 18 years old or older | 3 |
0.1%
|
| Sysmiss | 289 |