| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 60 |
18.4%
|
| 2 | Twice | 48 |
14.7%
|
| 3 | Three times or more | 215 |
66%
|
| 98 | Don't know | 3 |
0.9%
|
| Sysmiss | 41686 |