| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 11 |
0.4%
|
|
| 2000 | 9 |
0.3%
|
|
| 2001 | 8 |
0.3%
|
|
| 2002 | 11 |
0.4%
|
|
| 2003 | 27 |
0.9%
|
|
| 2004 | 42 |
1.4%
|
|
| 2005 | 83 |
2.8%
|
|
| 2006 | 519 |
17.6%
|
|
| 2007 | 477 |
16.2%
|
|
| 2008 | 640 |
21.8%
|
|
| 2009 | 1041 |
35.4%
|
|
| 2010 | 73 |
2.5%
|
|
| Sysmiss | 777 |