| Value | Category | Cases | |
|---|---|---|---|
| -95 | Refused | 0 |
0%
|
| 0 | Never | 703 |
35%
|
| 1 | Once | 564 |
28.1%
|
| 2 | From time to time | 525 |
26.1%
|
| 3 | Often | 174 |
8.7%
|
| r | 42 |
2.1%
|
|
| Sysmiss | 727 |