| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 253 |
21.1%
|
| 1 | Once or twice | 98 |
8.2%
|
| 2 | A few times | 56 |
4.7%
|
| 3 | Often | 3 |
0.3%
|
| 7 | Not applicable | 786 |
65.5%
|
| 8 | Refused | 3 |
0.3%
|
| 9 | Don't know | 1 |
0.1%
|