| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 2964 |
94.1%
|
| 1 | Once | 76 |
2.4%
|
| 2 | Twice | 38 |
1.2%
|
| 3 | 3-5 times | 27 |
0.9%
|
| 4 | More than 6 times | 26 |
0.8%
|
| 5 | I do not know | 0 |
0%
|
| 6 | Not applicable | 19 |
0.6%
|