| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 607 |
66.8%
|
| 2 | Twice | 136 |
15%
|
| 3 | Three times | 39 |
4.3%
|
| 4 | More than 3 times | 127 |
14%
|
| Sysmiss | 1474 |