| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 1 |
25%
|
|
| 1990 | 1 |
25%
|
|
| 2023 | 2 |
50%
|
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 42008 |