| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 2 |
5.9%
|
|
| 1992 | 1 |
2.9%
|
|
| 2002 | 1 |
2.9%
|
|
| 2006 | 1 |
2.9%
|
|
| 2007 | 1 |
2.9%
|
|
| 2008 | 1 |
2.9%
|
|
| 2009 | 1 |
2.9%
|
|
| 2010 | 2 |
5.9%
|
|
| 2011 | 1 |
2.9%
|
|
| 2012 | 6 |
17.6%
|
|
| 2013 | 10 |
29.4%
|
|
| 2014 | 6 |
17.6%
|
|
| 2015 | 1 |
2.9%
|
|
| Sysmiss | 166 |