| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
1.3%
|
|
| 2003 | 1 |
1.3%
|
|
| 2004 | 2 |
2.5%
|
|
| 2005 | 1 |
1.3%
|
|
| 2006 | 6 |
7.6%
|
|
| 2007 | 5 |
6.3%
|
|
| 2008 | 7 |
8.9%
|
|
| 2009 | 6 |
7.6%
|
|
| 2010 | 8 |
10.1%
|
|
| 2011 | 7 |
8.9%
|
|
| 2012 | 7 |
8.9%
|
|
| 2013 | 9 |
11.4%
|
|
| 2014 | 12 |
15.2%
|
|
| 2015 | 7 |
8.9%
|
|
| Sysmiss | 12328 |