| Value | Category | Cases | |
|---|---|---|---|
| 1 | Morethan2PerYear | 4864 |
25.7%
|
| 2 | Never | 9118 |
48.2%
|
| 3 | OneToTwoTimesPerYear | 4928 |
26.1%
|
| Sysmiss | 10 |