| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1990 | 4 |
1.6%
|
| 2 | 1991 | 23 |
9.3%
|
| 3 | 1992 | 19 |
7.7%
|
| 4 | 1993 | 3 |
1.2%
|
| 5 | 1995 | 1 |
0.4%
|
| 6 | 1996 | 2 |
0.8%
|
| 7 | 1997 | 2 |
0.8%
|
| 8 | 1998 | 5 |
2%
|
| 9 | 1999 | 5 |
2%
|
| 10 | 2000 | 5 |
2%
|
| 11 | 2001 | 5 |
2%
|
| 12 | 2002 | 3 |
1.2%
|
| 13 | 2005 | 1 |
0.4%
|
| 14 | 2006 | 3 |
1.2%
|
| 15 | 2007 | 3 |
1.2%
|
| 16 | 2008 | 8 |
3.2%
|
| 17 | 2009 | 3 |
1.2%
|
| 18 | 2010 | 18 |
7.3%
|
| 19 | 2011 | 18 |
7.3%
|
| 20 | 2012 | 9 |
3.6%
|
| 21 | 2013 | 5 |
2%
|
| 22 | 2014 | 5 |
2%
|
| 23 | 2015 | 26 |
10.5%
|
| 24 | 2016 | 50 |
20.2%
|
| 25 | 2017 | 10 |
4%
|
| 26 | 2018 | 6 |
2.4%
|
| 27 | 2019 | 2 |
0.8%
|
| 28 | 2020 | 3 |
1.2%
|