| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1097 |
91.4%
|
| 1 | Once or twice | 60 |
5%
|
| 2 | Several times | 28 |
2.3%
|
| 3 | Many times | 13 |
1.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.2%
|