| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1998 or after | 190 |
3.9%
|
| 2 | 1997 | 1483 |
30.1%
|
| 3 | 1996 | 1490 |
30.3%
|
| 4 | 1995 | 1580 |
32.1%
|
| 5 | 1994 | 138 |
2.8%
|
| 6 | 1993 or earlier | 40 |
0.8%
|
| Sysmiss | 42 |