| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 185 |
29.9%
|
| 2 | Twice | 149 |
24.1%
|
| 3 | Three times | 109 |
17.6%
|
| 4 | More than three times | 176 |
28.4%
|
| 8 | Unknown | 0 |
0%
|
| Sysmiss | 322 |