| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 4 |
0.3%
|
|
| 2001 | 2 |
0.1%
|
|
| 2002 | 2 |
0.1%
|
|
| 2003 | 3 |
0.2%
|
|
| 2004 | 9 |
0.6%
|
|
| 2005 | 3 |
0.2%
|
|
| 2006 | 6 |
0.4%
|
|
| 2007 | 7 |
0.4%
|
|
| 2008 | 20 |
1.3%
|
|
| 2009 | 22 |
1.4%
|
|
| 2010 | 43 |
2.7%
|
|
| 2011 | 73 |
4.6%
|
|
| 2012 | 162 |
10.1%
|
|
| 2013 | 565 |
35.4%
|
|
| 2014 | 677 |
42.4%
|
|
| Sysmiss | 1 |