| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 1 |
3.3%
|
|
| 2005 | 1 |
3.3%
|
|
| 2006 | 1 |
3.3%
|
|
| 2008 | 1 |
3.3%
|
|
| 2009 | 2 |
6.7%
|
|
| 2010 | 2 |
6.7%
|
|
| 2011 | 3 |
10%
|
|
| 2012 | 10 |
33.3%
|
|
| 2013 | 9 |
30%
|
|
| Sysmiss | 437 |