| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 312 |
24.7%
|
| 1 | Once or twice | 34 |
2.7%
|
| 2 | Several times | 13 |
1%
|
| 3 | Many times | 6 |
0.5%
|
| 7 | Not applicable/Saw no problems | 886 |
70.1%
|
| 9 | Don't know | 13 |
1%
|
| 998 | Refused | 0 |
0%
|