| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1157 |
79.6%
|
| 1 | 1. once | 186 |
12.8%
|
| 2 | 2. 2-3 times | 81 |
5.6%
|
| 3 | 3. 4 or more times | 30 |
2.1%
|
| Sysmiss | 109 |