| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 1041 |
62.2%
|
| 2 | Twice | 417 |
24.9%
|
| 3 | Three times | 148 |
8.8%
|
| 4 | More than three times | 67 |
4%
|
| Sysmiss | 51006 |