| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. only once | 4 |
21.1%
|
| 2 | 2. 2 to 10 times | 7 |
36.8%
|
| 3 | 3. >10 times | 8 |
42.1%
|
| 8 | 8. refused | 0 |
0%
|
| 9 | 9. don't know | 0 |
0%
|
| Sysmiss | 80 |