| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1295 |
89.1%
|
| 1 | 1. once | 106 |
7.3%
|
| 2 | 2. 2-3 times | 39 |
2.7%
|
| 3 | 3. 4 or more times | 14 |
1%
|
| Sysmiss | 109 |