| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 153 |
12.8%
|
| 1 | Once or twice | 6 |
0.5%
|
| 2 | Several times | 8 |
0.7%
|
| 3 | Many times | 5 |
0.4%
|
| 7 | Not applicable/Saw no problems | 966 |
80.5%
|
| 9 | Don't know | 62 |
5.2%
|
| 998 | Refused | 0 |
0%
|