| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 428 |
1.7%
|
| 2 | Monthly | 2279 |
9.3%
|
| 3 | Yearly | 1349 |
5.5%
|
| 4 | Less often | 2791 |
11.3%
|
| 5 | Not at all | 17745 |
72.2%
|
| Sysmiss | 516 |