| Value | Category | Cases | |
|---|---|---|---|
| 1 | Always | 10391 |
5.2%
|
| 2 | Sometimes | 15397 |
7.8%
|
| 3 | Never | 25604 |
12.9%
|
| 93 | Refused | 123 |
0.1%
|
| 97 | Not applicable | 79853 |
40.3%
|
| 99 | Missing | 67011 |
33.8%
|
| Sysmiss | 104567 |