| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1352 |
89%
|
| 1 | 1. once | 100 |
6.6%
|
| 2 | 2. 2-3 times | 50 |
3.3%
|
| 3 | 3. 4 or more times | 17 |
1.1%
|
| Sysmiss | 44 |