| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 591 |
2.4%
|
| 2 | Monthly | 1617 |
6.5%
|
| 3 | Yearly | 1118 |
4.5%
|
| 4 | Less often | 2818 |
11.4%
|
| 5 | Not at all | 18623 |
75.2%
|
| Sysmiss | 817 |