| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. None | 3131 |
44.4%
|
| 1 | 1. Once or twice | 1002 |
14.2%
|
| 2 | 2. 3 to 10 times | 842 |
11.9%
|
| 3 | 3. more than 10 times | 522 |
7.4%
|
| 9 | 9. Don't know/no answer | 5 |
0.1%
|
| Sysmiss | 1555 |
22%
|