| Value | Category | Cases | |
|---|---|---|---|
| 99 | Before 2005 | 45 |
3.6%
|
| 2005 | 2005 | 9 |
0.7%
|
| 2006 | 2006 | 93 |
7.5%
|
| 2007 | 2007 | 121 |
9.8%
|
| 2008 | 2008 | 210 |
16.9%
|
| 2009 | 2009 | 315 |
25.4%
|
| 2010 | 2010 | 322 |
26%
|
| 2011 | 2011 | 125 |
10.1%
|
| 2012 | 2012 | 0 |
0%
|
| Sysmiss | 8472 |