| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
0%
|
|
| 8 | 1 |
0%
|
|
| 1995 | 79 |
2%
|
|
| 1996 | 547 |
14.1%
|
|
| 1997 | 676 |
17.4%
|
|
| 1998 | 800 |
20.6%
|
|
| 1999 | 1060 |
27.3%
|
|
| 2000 | 718 |
18.5%
|
|
| 9997 | Missing | 0 |
0%
|
| Sysmiss | 3384 |