| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 98 |
0.4%
|
| 2 | Monthly | 448 |
1.8%
|
| 3 | Yearly | 1842 |
7.5%
|
| 4 | Less often | 2434 |
9.9%
|
| 5 | Not at all | 19770 |
80.4%
|
| Sysmiss | 516 |