| Value | Category | Cases | |
|---|---|---|---|
| 99 | Before 2005 | 269 |
16.4%
|
| 2005 | 2005 | 30 |
1.8%
|
| 2006 | 2006 | 51 |
3.1%
|
| 2007 | 2007 | 88 |
5.4%
|
| 2008 | 2008 | 127 |
7.7%
|
| 2009 | 2009 | 211 |
12.9%
|
| 2010 | 2010 | 301 |
18.3%
|
| 2011 | 2011 | 416 |
25.4%
|
| 2012 | 2012 | 148 |
9%
|
| Sysmiss | 1762 |