| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 3 |
0.4%
|
|
| 2008 | 10 |
1.2%
|
|
| 2009 | 437 |
52.3%
|
|
| 2010 | 385 |
46.1%
|
|
| Sysmiss | 490 |