| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 1 |
2.4%
|
|
| 2007 | 1 |
2.4%
|
|
| 2009 | 4 |
9.8%
|
|
| 2010 | 1 |
2.4%
|
|
| 2011 | 5 |
12.2%
|
|
| 2012 | 7 |
17.1%
|
|
| 2013 | 7 |
17.1%
|
|
| 2014 | 14 |
34.1%
|
|
| 2015 | 1 |
2.4%
|
|
| Sysmiss | 154 |