| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 1 |
0.3%
|
|
| 2006 | 30 |
8.7%
|
|
| 2007 | 7 |
2%
|
|
| 2008 | 10 |
2.9%
|
|
| 2009 | 9 |
2.6%
|
|
| 2010 | 9 |
2.6%
|
|
| 2011 | 28 |
8.1%
|
|
| 2012 | 31 |
9%
|
|
| 2013 | 66 |
19.1%
|
|
| 2014 | 60 |
17.3%
|
|
| 2015 | 95 |
27.5%
|