| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 1733 |
45.4%
|
| 2 | Twice | 952 |
25%
|
| 3 | Three times | 281 |
7.4%
|
| 4 | More than three times | 274 |
7.2%
|
| 5 | 15 |
0.4%
|
|
| 7 | N/A | 558 |
14.6%
|
| Sysmiss | 737 |