| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 523 |
2.1%
|
| 2 | Monthly | 800 |
3.2%
|
| 3 | Yearly | 1334 |
5.4%
|
| 4 | Less often | 3066 |
12.4%
|
| 5 | Not at all | 19044 |
76.9%
|
| Sysmiss | 817 |