| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 1 |
0.9%
|
|
| 1995 | 3 |
2.6%
|
|
| 1999 | 3 |
2.6%
|
|
| 2001 | 2 |
1.7%
|
|
| 2002 | 1 |
0.9%
|
|
| 2003 | 3 |
2.6%
|
|
| 2004 | 2 |
1.7%
|
|
| 2005 | 3 |
2.6%
|
|
| 2006 | 2 |
1.7%
|
|
| 2007 | 1 |
0.9%
|
|
| 2008 | 3 |
2.6%
|
|
| 2009 | 1 |
0.9%
|
|
| 2010 | 5 |
4.3%
|
|
| 2011 | 3 |
2.6%
|
|
| 2012 | 8 |
6.9%
|
|
| 2013 | 3 |
2.6%
|
|
| 2014 | 15 |
12.9%
|
|
| 2015 | 10 |
8.6%
|
|
| 2016 | 13 |
11.2%
|
|
| 2017 | 11 |
9.5%
|
|
| 2018 | 8 |
6.9%
|
|
| 2019 | 11 |
9.5%
|
|
| 2020 | 4 |
3.4%
|