| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 1 |
0%
|
|
| 2004 | 56 |
1.4%
|
|
| 2005 | 1330 |
34.3%
|
|
| 2006 | 331 |
8.5%
|
|
| 2007 | 86 |
2.2%
|
|
| 2008 | 1696 |
43.8%
|
|
| 2009 | 342 |
8.8%
|
|
| 2010 | 31 |
0.8%
|
|
| Sysmiss | 2708 |