| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1207 |
79.5%
|
| 1 | 1. once | 217 |
14.3%
|
| 2 | 2. 2-3 times | 69 |
4.5%
|
| 3 | 3. 4 or more times | 26 |
1.7%
|
| Sysmiss | 44 |