| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 222 |
18.5%
|
| 1 | Once or twice | 64 |
5.3%
|
| 2 | Several times | 82 |
6.8%
|
| 3 | Many times | 87 |
7.3%
|
| 7 | Not applicable/Saw no problems | 745 |
62.1%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|