| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 889 |
74.1%
|
| 1 | Only once | 137 |
11.4%
|
| 2 | A few times | 144 |
12%
|
| 3 | Often | 30 |
2.5%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|