| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1299 |
89.3%
|
| 1 | 1. once | 102 |
7%
|
| 2 | 2. 2-3 times | 33 |
2.3%
|
| 3 | 3. 4 or more times | 20 |
1.4%
|
| Sysmiss | 109 |