| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 12 |
0.4%
|
|
| 1992 | 22 |
0.7%
|
|
| 1993 | 22 |
0.7%
|
|
| 1994 | 129 |
3.8%
|
|
| 1995 | 252 |
7.4%
|
|
| 1996 | 277 |
8.2%
|
|
| 1997 | 270 |
8%
|
|
| 1998 | 292 |
8.6%
|
|
| 1999 | 519 |
15.3%
|
|
| 2000 | 359 |
10.6%
|
|
| 2001 | 267 |
7.9%
|
|
| 2002 | 574 |
17%
|
|
| 2003 | 166 |
4.9%
|
|
| 2004 | 68 |
2%
|
|
| 2005 | 34 |
1%
|
|
| 2006 | 26 |
0.8%
|
|
| 2007 | 26 |
0.8%
|
|
| 2008 | 43 |
1.3%
|
|
| 2009 | 19 |
0.6%
|
|
| 2010 | 5 |
0.1%
|
|
| 2011 | 2 |
0.1%
|
|
| Sysmiss | 3369 |