| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 12 |
21.4%
|
| 2 | Twice | 19 |
33.9%
|
| 3 | Three times or more | 24 |
42.9%
|
| 98 | Don't know | 1 |
1.8%
|
| Sysmiss | 25386 |