| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 212 |
17.7%
|
| 1 | Once or twice | 178 |
14.8%
|
| 2 | Several times | 197 |
16.4%
|
| 3 | Many times | 50 |
4.2%
|
| 7 | Not applicable/Saw no problems | 563 |
46.9%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|