| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 3465 |
84.7%
|
| 2 | 7 years old or younger | 116 |
2.8%
|
| 3 | 8 or 9 years old | 84 |
2.1%
|
| 4 | 10 or 11 years old | 68 |
1.7%
|
| 5 | 12 or 13 years old | 187 |
4.6%
|
| 6 | 14 or 15 years old | 146 |
3.6%
|
| 7 | 16 or 17 years old | 21 |
0.5%
|
| 8 | 18 years old or older | 2 |
0%
|
| Sysmiss | 285 |