| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 32 |
0.1%
|
|
| 1998 | 4 |
0%
|
|
| 1999 | 16 |
0.1%
|
|
| 2000 | 49 |
0.2%
|
|
| 2001 | 4 |
0%
|
|
| 2002 | 155 |
0.6%
|
|
| 2003 | 172 |
0.7%
|
|
| 2004 | 45 |
0.2%
|
|
| 2005 | 201 |
0.8%
|
|
| 2006 | 640 |
2.6%
|
|
| 2007 | 1457 |
6%
|
|
| 2008 | 8359 |
34.3%
|
|
| 2009 | 4177 |
17.2%
|
|
| 2010 | 982 |
4%
|
|
| 2011 | 1012 |
4.2%
|
|
| 2012 | 953 |
3.9%
|
|
| 2013 | 959 |
3.9%
|
|
| 2014 | 1491 |
6.1%
|
|
| 2015 | 2216 |
9.1%
|
|
| 2016 | 1412 |
5.8%
|
|
| Sysmiss | 137130 |