| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 1887 |
1.7%
|
|
| 2007 | 18832 |
16.9%
|
|
| 2008 | 29115 |
26.2%
|
|
| 2009 | 36971 |
33.2%
|
|
| 2010 | 24488 |
22%
|