| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 2563 |
81.6%
|
| 2 | Once | 173 |
5.5%
|
| 3 | Twice | 140 |
4.5%
|
| 4 | 3-4 times | 90 |
2.9%
|
| 5 | 5 times or more | 84 |
2.7%
|
| 8 | Don't know | 90 |
2.9%
|
| Sysmiss | 43 |