| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't know | 2 |
0.5%
|
| 1 | Once | 1 |
0.2%
|
| 2 | Twice | 9 |
2.1%
|
| 3 | Three times | 172 |
39.6%
|
| 4 | Four times | 250 |
57.6%
|
| a | Not applicable | 0 | |
| b | Don't know | 0 | |
| c | Refused to respond | 0 |