| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 828 |
68.5%
|
| 1 | Only once | 134 |
11.1%
|
| 2 | A few times | 124 |
10.3%
|
| 3 | Often | 115 |
9.5%
|
| 9 | Don't know | 7 |
0.6%
|
| 998 | Refused | 0 |
0%
|