| Value | Category | Cases | |
|---|---|---|---|
| 1974 | 1 |
20%
|
|
| 1982 | 1 |
20%
|
|
| 2021 | 2 |
40%
|
|
| 2025 | 1 |
20%
|
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 42007 |