| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 14 |
4.4%
|
|
| 2008 | 30 |
9.3%
|
|
| 2009 | 87 |
27.1%
|
|
| 2010 | 190 |
59.2%
|
|
| Sysmiss | 30245 |