| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1365 |
93.9%
|
| 1 | 1. once | 71 |
4.9%
|
| 2 | 2. 2-3 times | 15 |
1%
|
| 3 | 3. 4 or more times | 3 |
0.2%
|
| Sysmiss | 109 |