| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. None | 4015 |
56.9%
|
| 1 | 1. Once or twice | 631 |
8.9%
|
| 2 | 2. 3 to 10 times | 513 |
7.3%
|
| 3 | 3. more than 10 times | 339 |
4.8%
|
| 9 | 9. Don't know/no answer | 4 |
0.1%
|
| Sysmiss | 1555 |
22%
|