| Value | Category | Cases | |
|---|---|---|---|
| 1998 | 1 |
2.3%
|
|
| 2000 | 1 |
2.3%
|
|
| 2006 | 1 |
2.3%
|
|
| 2007 | 1 |
2.3%
|
|
| 2008 | 4 |
9.3%
|
|
| 2009 | 3 |
7%
|
|
| 2010 | 2 |
4.7%
|
|
| 2011 | 3 |
7%
|
|
| 2012 | 4 |
9.3%
|
|
| 2013 | 2 |
4.7%
|
|
| 2014 | 4 |
9.3%
|
|
| 2015 | 11 |
25.6%
|
|
| 2016 | 4 |
9.3%
|
|
| 2017 | 2 |
4.7%
|