| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 112 |
0.5%
|
| 2 | Monthly | 87 |
0.4%
|
| 3 | Yearly | 326 |
1.3%
|
| 4 | Less often | 758 |
3.1%
|
| 5 | Not at all | 23309 |
94.8%
|
| Sysmiss | 516 |