| Value | Category | Cases | |
|---|---|---|---|
| 1 | inject | 4 |
0.3%
|
| 2 | smoke | 17 |
1.4%
|
| 3 | eat/drink/swallow | 1139 |
96.8%
|
| 4 | sniff | 4 |
0.3%
|
| 5 | inhale | 1 |
0.1%
|
| 6 | tinfoil | 3 |
0.3%
|
| 7 | don't know | 6 |
0.5%
|
| 8 | other specify | 3 |
0.3%
|
| Sysmiss | 37605 |