| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 195 |
0.8%
|
| 2 | Monthly | 630 |
2.5%
|
| 3 | Yearly | 2515 |
10.2%
|
| 4 | Less often | 3403 |
13.7%
|
| 5 | Not at all | 18024 |
72.8%
|
| Sysmiss | 817 |