| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1985 | 2 |
1.4%
|
| 2 | 1994 | 1 |
0.7%
|
| 3 | 1998 | 2 |
1.4%
|
| 4 | 2000 | 5 |
3.6%
|
| 5 | 2001 | 2 |
1.4%
|
| 6 | 2002 | 2 |
1.4%
|
| 7 | 2004 | 4 |
2.9%
|
| 8 | 2006 | 2 |
1.4%
|
| 9 | 2007 | 4 |
2.9%
|
| 10 | 2008 | 4 |
2.9%
|
| 11 | 2009 | 4 |
2.9%
|
| 12 | 2010 | 4 |
2.9%
|
| 13 | 2012 | 7 |
5%
|
| 14 | 2013 | 9 |
6.4%
|
| 15 | 2014 | 5 |
3.6%
|
| 16 | 2015 | 10 |
7.1%
|
| 17 | 2016 | 6 |
4.3%
|
| 18 | 2017 | 8 |
5.7%
|
| 19 | 2018 | 11 |
7.9%
|
| 20 | 2019 | 27 |
19.3%
|
| 21 | 2021 | 13 |
9.3%
|
| Missing value | 8 |
5.7%
|