| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 110 |
8.1%
|
| 1 | Once or twice | 32 |
2.4%
|
| 2 | Several times | 38 |
2.8%
|
| 3 | Many times | 17 |
1.3%
|
| 7 | Not applicable/Saw no problems | 863 |
63.9%
|
| 9 | Don't know | 290 |
21.5%
|
| 998 | Refused | 0 |
0%
|