| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1602 |
66.8%
|
| 1 | Only once | 335 |
14%
|
| 2 | A few times | 264 |
11%
|
| 3 | Often | 194 |
8.1%
|
| 9 | Don't know | 5 |
0.2%
|
| 998 | Refused | 0 |
0%
|