| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 |
0.8%
|
|
| 2006 | 1 |
0.8%
|
|
| 2007 | 1 |
0.8%
|
|
| 2008 | 1 |
0.8%
|
|
| 2009 | 7 |
5.6%
|
|
| 2010 | 3 |
2.4%
|
|
| 2011 | 25 |
19.8%
|
|
| 2012 | 87 |
69%
|