| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
0.2%
|
|
| 2000 | 4 |
0.7%
|
|
| 2001 | 4 |
0.7%
|
|
| 2002 | 2 |
0.4%
|
|
| 2003 | 8 |
1.4%
|
|
| 2004 | 17 |
3.1%
|
|
| 2005 | 24 |
4.3%
|
|
| 2006 | 37 |
6.7%
|
|
| 2007 | 87 |
15.6%
|
|
| 2008 | 148 |
26.6%
|
|
| 2009 | 198 |
35.6%
|
|
| 2010 | 24 |
4.3%
|
|
| 2011 | 2 |
0.4%
|
|
| Sysmiss | 9956 |