| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
0%
|
|
| 1995 | 2 |
0.1%
|
|
| 2003 | 2 |
0.1%
|
|
| 2006 | 1 |
0%
|
|
| 2007 | 350 |
14.3%
|
|
| 2008 | 826 |
33.8%
|
|
| 2009 | 1261 |
51.6%
|
|
| Sysmiss | 29919 |