| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. not at all | 1407 |
98.5%
|
| 1 | 1. once | 18 |
1.3%
|
| 2 | 2. 2-3 times | 1 |
0.1%
|
| 3 | 3. 4 or more times | 3 |
0.2%
|
| Sysmiss | 134 |