| Value | Category | Cases | |
|---|---|---|---|
| 1986 | 1 |
0.3%
|
|
| 1995 | 1 |
0.3%
|
|
| 1998 | 3 |
0.8%
|
|
| 2000 | 2 |
0.5%
|
|
| 2001 | 1 |
0.3%
|
|
| 2002 | 4 |
1%
|
|
| 2003 | 1 |
0.3%
|
|
| 2005 | 2 |
0.5%
|
|
| 2006 | 7 |
1.8%
|
|
| 2007 | 7 |
1.8%
|
|
| 2008 | 9 |
2.3%
|
|
| 2009 | 6 |
1.5%
|
|
| 2010 | 6 |
1.5%
|
|
| 2011 | 16 |
4%
|
|
| 2012 | 14 |
3.5%
|
|
| 2013 | 20 |
5%
|
|
| 2014 | 17 |
4.3%
|
|
| 2015 | 23 |
5.8%
|
|
| 2016 | 46 |
11.5%
|
|
| 2017 | 25 |
6.3%
|
|
| 2018 | 42 |
10.5%
|
|
| 2019 | 97 |
24.3%
|
|
| 2020 | 3 |
0.8%
|
|
| Missing value | 47 |
11.8%
|