| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 2 |
0.3%
|
|
| 2002 | 1 |
0.2%
|
|
| 2003 | 5 |
0.8%
|
|
| 2004 | 2 |
0.3%
|
|
| 2005 | 3 |
0.5%
|
|
| 2006 | 1 |
0.2%
|
|
| 2007 | 9 |
1.4%
|
|
| 2008 | 16 |
2.4%
|
|
| 2009 | 38 |
5.7%
|
|
| 2010 | 69 |
10.4%
|
|
| 2011 | 83 |
12.6%
|
|
| 2012 | 143 |
21.6%
|
|
| 2013 | 101 |
15.3%
|
|
| 2014 | 156 |
23.6%
|
|
| 2015 | 32 |
4.8%
|
|
| Sysmiss | 531 |