| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 678 |
56.5%
|
| 1 | Once or twice | 129 |
10.8%
|
| 2 | A few times | 52 |
4.3%
|
| 3 | Often | 30 |
2.5%
|
| 7 | Not applicable | 306 |
25.5%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 4 |
0.3%
|