| Value | Category | Cases | |
|---|---|---|---|
| 4 | 1 |
0%
|
|
| 9 | 1 |
0%
|
|
| 66 | 1 |
0%
|
|
| 1995 | 17 |
0.5%
|
|
| 1996 | 417 |
12.3%
|
|
| 1997 | 611 |
18%
|
|
| 1998 | 740 |
21.8%
|
|
| 1999 | 891 |
26.2%
|
|
| 2000 | 716 |
21.1%
|
|
| 9997 | Missing | 0 |
0%
|
| Sysmiss | 3871 |