| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. per week | 57634 |
3.4%
|
| 2 | 2. per month | 236536 |
14%
|
| 3 | 3. annually | 1649 |
0.1%
|
| 8 | 8. not applicable | 1304787 |
77.3%
|
| 9 | 9. unspecified | 87452 |
5.2%
|
| Sysmiss | 759992 |