| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 206 |
17.2%
|
| 1 | Once or twice | 67 |
5.6%
|
| 2 | Several times | 81 |
6.8%
|
| 3 | Many times | 101 |
8.4%
|
| 7 | Not applicable/Saw no problems | 745 |
62.1%
|
| 9 | Don't know | 0 |
0%
|
| 998 | Refused | 0 |
0%
|