| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 16 |
6.2%
|
|
| 2001 | 5 |
1.9%
|
|
| 2002 | 5 |
1.9%
|
|
| 2003 | 23 |
8.9%
|
|
| 2004 | 10 |
3.9%
|
|
| 2005 | 11 |
4.3%
|
|
| 2006 | 13 |
5%
|
|
| 2007 | 18 |
7%
|
|
| 2008 | 25 |
9.7%
|
|
| 2009 | 16 |
6.2%
|
|
| 2010 | 26 |
10.1%
|
|
| 2011 | 27 |
10.5%
|
|
| 2012 | 24 |
9.3%
|
|
| 2013 | 17 |
6.6%
|
|
| 2014 | 10 |
3.9%
|
|
| 2015 | 6 |
2.3%
|
|
| 2016 | 1 |
0.4%
|
|
| 2017 | 5 |
1.9%
|