| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 3 |
0.1%
|
|
| 2007 | 478 |
12.1%
|
|
| 2008 | 568 |
14.3%
|
|
| 2009 | 602 |
15.2%
|
|
| 2010 | 618 |
15.6%
|
|
| 2011 | 570 |
14.4%
|
|
| 2012 | 539 |
13.6%
|
|
| 2013 | 489 |
12.3%
|
|
| 2014 | 99 |
2.5%
|
|
| Sysmiss | 18722 |