| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 261 |
1.1%
|
| 2 | Monthly | 819 |
3.3%
|
| 3 | Yearly | 1187 |
4.8%
|
| 4 | Less often | 2232 |
9.1%
|
| 5 | Not at all | 20093 |
81.7%
|
| Sysmiss | 516 |