| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 665 |
27.7%
|
| 1 | Once or twice | 240 |
10%
|
| 2 | Several times | 215 |
9%
|
| 3 | Many times | 95 |
4%
|
| 7 | Not applicable/Saw no problems | 1141 |
47.5%
|
| 9 | Don't know | 44 |
1.8%
|
| 998 | Refused | 0 |
0%
|