| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 944 |
78.7%
|
| 1 | Only once | 141 |
11.8%
|
| 2 | A few times | 85 |
7.1%
|
| 3 | Often | 30 |
2.5%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|