| Value | Category | Cases | |
|---|---|---|---|
| -95 | Refused | 0 |
0%
|
| 0 | Never | 1622 |
80.8%
|
| 1 | Once | 177 |
8.8%
|
| 2 | From time to time | 124 |
6.2%
|
| 3 | Often | 39 |
1.9%
|
| r | 46 |
2.3%
|
|
| Sysmiss | 727 |