| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not at all | 31 |
3.3%
|
| 2 | Once or twice | 171 |
18.1%
|
| 3 | Three to six times | 232 |
24.6%
|
| 4 | More than six times | 469 |
49.7%
|
| 5 | Don't know | 0 |
0%
|
| 8 | Missing | 14 |
1.5%
|
| 9 | Not applicable | 26 |
2.8%
|