| Value | Category | Cases | |
|---|---|---|---|
| 1 | never | 625 |
9.5%
|
| 2 | once or twice | 1366 |
20.8%
|
| 3 | more often | 915 |
14%
|
| 9 | not applicable | 3307 |
50.4%
|
| 9999995 | missing:impute | 345 |
5.3%
|
| Sysmiss | 45 |