| Value | Category | Cases | |
|---|---|---|---|
| -95 | Refused | 0 |
0%
|
| 0 | Never | 1239 |
61.7%
|
| 1 | Once | 350 |
17.4%
|
| 2 | From time to time | 247 |
12.3%
|
| 3 | Often | 126 |
6.3%
|
| r | 46 |
2.3%
|
|
| Sysmiss | 727 |