| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Year given correctly | 530 |
95.8%
|
| 2 | 2. Year given incorrectly/does not know | 22 |
4%
|
| 98 | 98. Refused | 1 |
0.2%
|
| Sysmiss | 446 |