| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1350 |
88.9%
|
| 1 | 1. once | 125 |
8.2%
|
| 2 | 2. 2-3 times | 32 |
2.1%
|
| 3 | 3. 4 or more times | 12 |
0.8%
|
| Sysmiss | 44 |