| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1143 |
95.3%
|
| 1 | Once or twice | 19 |
1.6%
|
| 2 | Several times | 29 |
2.4%
|
| 3 | Many times | 8 |
0.7%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|