| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1094 |
4.4%
|
| 2 | Monthly | 827 |
3.4%
|
| 3 | Yearly | 873 |
3.5%
|
| 4 | Less often | 1992 |
8.1%
|
| 5 | Not at all | 19864 |
80.6%
|
| Sysmiss | 510 |