| Value | Category | Cases | |
|---|---|---|---|
| 10 | 1 |
0.1%
|
|
| 2009 | 8 |
0.8%
|
|
| 2010 | 502 |
52.5%
|
|
| 2011 | 446 |
46.6%
|
|
| Sysmiss | 619 |