| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 28 |
0.1%
|
|
| 1998 | 20 |
0.1%
|
|
| 1999 | 42 |
0.2%
|
|
| 2000 | 96 |
0.5%
|
|
| 2001 | 63 |
0.3%
|
|
| 2002 | 15 |
0.1%
|
|
| 2003 | 60 |
0.3%
|
|
| 2004 | 82 |
0.4%
|
|
| 2005 | 123 |
0.7%
|
|
| 2006 | 50 |
0.3%
|
|
| 2007 | 977 |
5.2%
|
|
| 2008 | 7943 |
42.2%
|
|
| 2009 | 6454 |
34.3%
|
|
| 2010 | 784 |
4.2%
|
|
| 2011 | 246 |
1.3%
|
|
| 2012 | 211 |
1.1%
|
|
| 2013 | 412 |
2.2%
|
|
| 2014 | 495 |
2.6%
|
|
| 2015 | 584 |
3.1%
|
|
| 2016 | 155 |
0.8%
|
|
| Sysmiss | 142626 |