| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 |
0.5%
|
|
| 2005 | 1 |
0.5%
|
|
| 2008 | 5 |
2.5%
|
|
| 2009 | 28 |
14.1%
|
|
| 2010 | 163 |
82.3%
|
|
| Sysmiss | 112 |