| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1978 | 1 | 1 |
72.1%
|
|
| 1979 | 1 | 0 |
13.9%
|
|
| 1984 | 1 | 0 |
13.9%
|
|
| Sysmiss | 3290 | 3291 |