| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 23384 |
86.3%
|
| 2 | 7 years old or younger | 358 |
1.3%
|
| 3 | 8 or 9 years old | 236 |
0.9%
|
| 4 | 10 or 11 years old | 303 |
1.1%
|
| 5 | 12 or 13 years old | 924 |
3.4%
|
| 6 | 14 or 15 years old | 1485 |
5.5%
|
| 7 | 16 years old or older | 394 |
1.5%
|
| Sysmiss | 1284 |