| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0.4%
|
|
| 2001 | 2 |
0.8%
|
|
| 2006 | 2 |
0.8%
|
|
| 2007 | 13 |
5.5%
|
|
| 2008 | 15 |
6.3%
|
|
| 2009 | 27 |
11.4%
|
|
| 2010 | 73 |
30.8%
|
|
| 2011 | 104 |
43.9%
|
|
| Sysmiss | 14573 |