| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 1822 |
58.4%
|
| 1 | once or twice | 544 |
17.4%
|
| 2 | 3 to 10 times | 483 |
15.5%
|
| 3 | more than 10 times | 265 |
8.5%
|
| 9 | Don't know/No answer | 4 |
0.1%
|
| Sysmiss | 4 |