| Value | Category | Cases | |
|---|---|---|---|
| 1998 | 1 |
0.1%
|
|
| 1999 | 2 |
0.3%
|
|
| 2000 | 4 |
0.5%
|
|
| 2002 | 2 |
0.3%
|
|
| 2003 | 6 |
0.8%
|
|
| 2004 | 5 |
0.7%
|
|
| 2005 | 9 |
1.2%
|
|
| 2006 | 10 |
1.3%
|
|
| 2007 | 12 |
1.6%
|
|
| 2008 | 14 |
1.8%
|
|
| 2009 | 31 |
4%
|
|
| 2010 | 73 |
9.5%
|
|
| 2011 | 50 |
6.5%
|
|
| 2012 | 56 |
7.3%
|
|
| 2013 | 62 |
8.1%
|
|
| 2014 | 56 |
7.3%
|
|
| 2015 | 50 |
6.5%
|
|
| 2016 | 44 |
5.7%
|
|
| 2017 | 32 |
4.2%
|
|
| 2018 | 14 |
1.8%
|
|
| 9998 | DK | 233 |
30.4%
|