| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 21 |
28.4%
|
| 2 | A few times | 38 |
51.4%
|
| 3 | Many tmes | 15 |
20.3%
|
| 4 | Other | 0 |
0%
|
| Sysmiss | 430 |