| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 2 |
1.4%
|
|
| 2002 | 1 |
0.7%
|
|
| 2003 | 5 |
3.4%
|
|
| 2004 | 1 |
0.7%
|
|
| 2005 | 5 |
3.4%
|
|
| 2006 | 8 |
5.5%
|
|
| 2007 | 9 |
6.2%
|
|
| 2008 | 12 |
8.3%
|
|
| 2009 | 11 |
7.6%
|
|
| 2010 | 15 |
10.3%
|
|
| 2011 | 18 |
12.4%
|
|
| 2012 | 15 |
10.3%
|
|
| 2013 | 14 |
9.7%
|
|
| 2014 | 14 |
9.7%
|
|
| 2015 | 11 |
7.6%
|
|
| 2016 | 4 |
2.8%
|
|
| Sysmiss | 12262 |