| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 5 |
6%
|
|
| 2006 | 18 |
21.4%
|
|
| 2007 | 14 |
16.7%
|
|
| 2008 | 21 |
25%
|
|
| 2009 | 14 |
16.7%
|
|
| 2010 | 12 |
14.3%
|