| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1194 |
78.6%
|
| 1 | 1. once | 196 |
12.9%
|
| 2 | 2. 2-3 times | 84 |
5.5%
|
| 3 | 3. 4 or more times | 45 |
3%
|
| Sysmiss | 44 |