| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 2617 |
86.9%
|
| 2 | Once | 198 |
6.6%
|
| 3 | Twice | 77 |
2.6%
|
| 4 | 3-4 times | 34 |
1.1%
|
| 5 | 5 times or more | 21 |
0.7%
|
| 8 | Don’t know | 63 |
2.1%
|
| Sysmiss | 47 |