| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 123 |
10.3%
|
| 1 | Once or twice | 78 |
6.5%
|
| 2 | Several times | 107 |
8.9%
|
| 3 | Many times | 147 |
12.3%
|
| 7 | Not applicable/Saw no problems | 745 |
62.1%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|