| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 139 |
0.6%
|
| 2 | Monthly | 241 |
1%
|
| 3 | Yearly | 579 |
2.4%
|
| 4 | Less often | 1174 |
4.8%
|
| 5 | Not at all | 22459 |
91.3%
|
| Sysmiss | 516 |