| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 40 |
8.6%
|
| 1 | One time | 181 |
38.8%
|
| 2 | Two times | 157 |
33.7%
|
| 3 | Three times or more | 81 |
17.4%
|
| 4 | Unsure | 7 |
1.5%
|
| Sysmiss | 475 |