| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0.6%
|
|
| 2007 | 3 |
1.7%
|
|
| 2008 | 4 |
2.3%
|
|
| 2009 | 8 |
4.7%
|
|
| 2010 | 54 |
31.4%
|
|
| 2011 | 13 |
7.6%
|
|
| 2012 | 25 |
14.5%
|
|
| 2013 | 49 |
28.5%
|
|
| 2014 | 15 |
8.7%
|
|
| Sysmiss | 68 |