| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, more than monthly | 26 |
0.6%
|
| 2 | Yes, monthly | 46 |
1%
|
| 3 | Yes, several times but less than monthly | 59 |
1.3%
|
| 4 | Yes, once or twice | 328 |
7.5%
|
| 5 | No | 3721 |
84.6%
|
| 77 | 81 |
1.8%
|
|
| 88 | 135 |
3.1%
|
|
| Sysmiss | 13 |