| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 7221 |
48.4%
|
| 1 | Yes, took no drug | 7608 |
51%
|
| 8 | Don't know | 94 |
0.6%
|
| 9 | 26 | ||
| Sysmiss | 68642 |