| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 2 |
0.1%
|
|
| 1994 | 1 |
0.1%
|
|
| 1996 | 8 |
0.4%
|
|
| 1997 | 7 |
0.4%
|
|
| 1998 | 17 |
0.9%
|
|
| 1999 | 19 |
1%
|
|
| 2000 | 42 |
2.2%
|
|
| 2001 | 28 |
1.5%
|
|
| 2002 | 46 |
2.4%
|
|
| 2003 | 128 |
6.8%
|
|
| 2004 | 153 |
8.1%
|
|
| 2005 | 258 |
13.6%
|
|
| 2006 | 424 |
22.4%
|
|
| 2007 | 435 |
23%
|
|
| 2008 | 190 |
10%
|
|
| 2009 | 109 |
5.8%
|
|
| 2010 | 28 |
1.5%
|
|
| Sysmiss | 6759 |