| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 14 |
1.2%
|
| 0 | Never | 207 |
17.3%
|
| 1 | Once or twice | 48 |
4%
|
| 2 | Several times | 38 |
3.2%
|
| 3 | Many times | 21 |
1.8%
|
| 7 | Not applicable/Saw no problems | 857 |
71.4%
|
| 9 | Don't know | 15 |
1.3%
|
| 998 | Refused | 0 |
0%
|