| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0.7%
|
|
| 2005 | 1 |
0.7%
|
|
| 2006 | 3 |
2.1%
|
|
| 2007 | 6 |
4.1%
|
|
| 2008 | 13 |
9%
|
|
| 2009 | 28 |
19.3%
|
|
| 2010 | 31 |
21.4%
|
|
| 2011 | 46 |
31.7%
|
|
| 2012 | 16 |
11%
|
|
| Sysmiss | 1890 |