| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. None | 3290 |
46.6%
|
| 1 | 1. Once or twice | 879 |
12.5%
|
| 2 | 2. 3 to 10 times | 865 |
12.3%
|
| 3 | 3. more than 10 times | 465 |
6.6%
|
| 9 | 9. Don't know/no answer | 3 |
0%
|
| Sysmiss | 1555 |
22%
|