| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 |
0%
|
|
| 2005 | 2 |
0.1%
|
|
| 2006 | 130 |
6.4%
|
|
| 2007 | 380 |
18.8%
|
|
| 2008 | 519 |
25.7%
|
|
| 2009 | 590 |
29.2%
|
|
| 2010 | 401 |
19.8%
|
|
| Sysmiss | 9250 |