| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 20 |
0.1%
|
|
| 1998 | 36 |
0.1%
|
|
| 1999 | 252 |
0.9%
|
|
| 2000 | 138 |
0.5%
|
|
| 2001 | 242 |
0.9%
|
|
| 2002 | 275 |
1%
|
|
| 2003 | 164 |
0.6%
|
|
| 2004 | 369 |
1.4%
|
|
| 2005 | 386 |
1.4%
|
|
| 2006 | 220 |
0.8%
|
|
| 2007 | 1222 |
4.5%
|
|
| 2008 | 8913 |
32.7%
|
|
| 2009 | 6443 |
23.7%
|
|
| 2010 | 1193 |
4.4%
|
|
| 2011 | 2228 |
8.2%
|
|
| 2012 | 935 |
3.4%
|
|
| 2013 | 1212 |
4.5%
|
|
| 2014 | 1032 |
3.8%
|
|
| 2015 | 1856 |
6.8%
|
|
| 2016 | 80 |
0.3%
|
|
| Sysmiss | 134250 |