| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 421 |
1.7%
|
| 2 | Monthly | 1348 |
5.5%
|
| 3 | Yearly | 1772 |
7.2%
|
| 4 | Less often | 2807 |
11.4%
|
| 5 | Not at all | 18244 |
74.2%
|
| Sysmiss | 516 |