| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 82 |
3.9%
|
| 1 | Once | 78 |
3.7%
|
| 2 | Two to four times | 1373 |
64.8%
|
| 3 | More than four times | 586 |
27.7%
|
| Sysmiss | 25357 |