| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 359 |
29.9%
|
| 1 | Once or twice | 44 |
3.7%
|
| 2 | Several times | 46 |
3.8%
|
| 3 | Many times | 12 |
1%
|
| 7 | Not applicable/Saw no problems | 734 |
61.2%
|
| 9 | Don't know | 5 |
0.4%
|
| 998 | Refused | 0 |
0%
|