| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 4 |
0%
|
|
| 1992 | 15 |
0.2%
|
|
| 1993 | 398 |
4.2%
|
|
| 1994 | 675 |
7.2%
|
|
| 1995 | 626 |
6.7%
|
|
| 1996 | 662 |
7%
|
|
| 1997 | 634 |
6.7%
|
|
| 1998 | 615 |
6.5%
|
|
| 1999 | 628 |
6.7%
|
|
| 2000 | 614 |
6.5%
|
|
| 2001 | 579 |
6.2%
|
|
| 2002 | 558 |
5.9%
|
|
| 2003 | 630 |
6.7%
|
|
| 2004 | 625 |
6.7%
|
|
| 2005 | 634 |
6.7%
|
|
| 2006 | 647 |
6.9%
|
|
| 2007 | 624 |
6.6%
|
|
| 2008 | 219 |
2.3%
|
|
| 9999 | Don't know | 8 |
0.1%
|
| Sysmiss | 209 |