| Value | Category | Cases | |
|---|---|---|---|
| 1998 | 2 |
0.2%
|
|
| 1999 | 1 |
0.1%
|
|
| 2000 | 3 |
0.4%
|
|
| 2001 | 3 |
0.4%
|
|
| 2003 | 1 |
0.1%
|
|
| 2005 | 1 |
0.1%
|
|
| 2006 | 2 |
0.2%
|
|
| 2007 | 7 |
0.9%
|
|
| 2008 | 7 |
0.9%
|
|
| 2009 | 119 |
14.8%
|
|
| 2010 | 241 |
29.9%
|
|
| 2011 | 266 |
33%
|
|
| 2012 | 152 |
18.9%
|
|
| Sysmiss | 5949 |