| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. None | 5001 |
70.9%
|
| 1 | 1. Once or twice | 284 |
4%
|
| 2 | 2. 3 to 10 times | 163 |
2.3%
|
| 3 | 3. more than 10 times | 51 |
0.7%
|
| 9 | 9. Don't know/no answer | 3 |
0%
|
| Sysmiss | 1555 |
22%
|