| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 349 |
4.7%
|
|
| 1996 | 1556 |
21%
|
|
| 1997 | 1412 |
19%
|
|
| 1998 | 1237 |
16.7%
|
|
| 1999 | 1588 |
21.4%
|
|
| 2000 | 1273 |
17.2%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 37832 |