| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1305 |
85.9%
|
| 1 | 1. once | 150 |
9.9%
|
| 2 | 2. 2-3 times | 44 |
2.9%
|
| 3 | 3. 4 or more times | 20 |
1.3%
|
| Sysmiss | 44 |