| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 131 |
0.5%
|
| 0 | Never | 3844 |
13.9%
|
| 1 | Once or twice | 3322 |
12%
|
| 2 | Several times | 3285 |
11.9%
|
| 3 | Many times | 1424 |
5.1%
|
| 7 | Not applicable/Saw no problems | 15112 |
54.5%
|
| 9 | Don't know | 595 |
2.1%
|
| 998 | Refused | 0 |
0%
|