| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 159 |
0.6%
|
| 2 | Monthly | 371 |
1.5%
|
| 3 | Yearly | 1277 |
5.2%
|
| 4 | Less often | 2138 |
8.6%
|
| 5 | Not at all | 20822 |
84.1%
|
| Sysmiss | 817 |