| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 1217 |
98.9%
|
| 1 | Once or twice | 8 |
0.7%
|
| 2 | Several times | 2 |
0.2%
|
| 3 | Many times | 3 |
0.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 0 |
0%
|
| Sysmiss | 26 |