| Value | Category | Cases | |
|---|---|---|---|
| -95 | Refused | 0 |
0%
|
| 0 | Never | 1828 |
91%
|
| 1 | Once | 93 |
4.6%
|
| 2 | From time to time | 27 |
1.3%
|
| 3 | Often | 24 |
1.2%
|
| r | 36 |
1.8%
|
|
| Sysmiss | 727 |