| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 362 |
1.5%
|
| 2 | Monthly | 668 |
2.7%
|
| 3 | Yearly | 2966 |
12.1%
|
| 4 | Less often | 4528 |
18.4%
|
| 5 | Not at all | 16068 |
65.3%
|
| Sysmiss | 516 |