| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 2465 |
96.2%
|
| 2 | 7 years old or younger | 25 |
1%
|
| 3 | 8 or 9 years old | 6 |
0.2%
|
| 4 | 10 or 11 years old | 10 |
0.4%
|
| 5 | 12 or 13 years old | 11 |
0.4%
|
| 6 | 14 or 15 years old | 21 |
0.8%
|
| 7 | 16 years old or older | 24 |
0.9%
|
| Sysmiss | 128 |