| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 1 |
0.1%
|
|
| 2004 | 3 |
0.4%
|
|
| 2005 | 121 |
18.1%
|
|
| 2006 | 196 |
29.3%
|
|
| 2007 | 201 |
30%
|
|
| 2008 | 104 |
15.5%
|
|
| 2009 | 37 |
5.5%
|
|
| 2010 | 6 |
0.9%
|
|
| Sysmiss | 12243 |