| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2415 |
9.8%
|
| 2 | Monthly | 2278 |
9.2%
|
| 3 | Yearly | 1826 |
7.4%
|
| 4 | Less often | 2998 |
12.2%
|
| 5 | Not at all | 15133 |
61.4%
|
| Sysmiss | 510 |