| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 41 |
3.4%
|
| 0 | Never | 57 |
4.8%
|
| 1 | Once or twice | 27 |
2.3%
|
| 2 | Several times | 36 |
3%
|
| 3 | Many times | 28 |
2.3%
|
| 7 | Not applicable/Saw no problems | 1011 |
84.3%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|