| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0%
|
|
| 2001 | 5 |
0.1%
|
|
| 2002 | 2 |
0%
|
|
| 2003 | 5 |
0.1%
|
|
| 2004 | 13 |
0.3%
|
|
| 2005 | 36 |
0.8%
|
|
| 2006 | 80 |
1.9%
|
|
| 2007 | 491 |
11.4%
|
|
| 2008 | 2250 |
52.3%
|
|
| 2009 | 1414 |
32.9%
|
|
| 2010 | 4 |
0.1%
|
|
| Sysmiss | 237 |