| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 2006 | 0 |
0%
|
| 2007 | 2007 | 0 |
0%
|
| 2008 | 2008 | 0 |
0%
|
| 2009 | 2009 | 0 |
0%
|
| 2010 | 2010 | 1 |
1.4%
|
| 2011 | 2011 | 68 |
98.6%
|
| Sysmiss | 471 |