| Value | Category | Cases | |
|---|---|---|---|
| -97 | NA | 0 |
0%
|
| -95 | Refuse | 0 |
0%
|
| 1 | Never | 152 |
7.7%
|
| 2 | From time to time | 859 |
43.4%
|
| 3 | Often | 828 |
41.8%
|
| a | 135 |
6.8%
|
|
| r | 6 |
0.3%
|
|
| Sysmiss | 755 |