| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 2868 |
89.4%
|
| 2 | 7 years old or younger | 155 |
4.8%
|
| 3 | 8 or 9 years old | 57 |
1.8%
|
| 4 | 10 or 11 years old | 45 |
1.4%
|
| 5 | 12 or 13 years old | 28 |
0.9%
|
| 6 | 14 or 15 years old | 23 |
0.7%
|
| 7 | 16 or 17 years old | 22 |
0.7%
|
| 8 | 18 years old or older | 10 |
0.3%
|
| Sysmiss | 496 |