| Value | Category | Cases | |
|---|---|---|---|
| 1953 | 1 |
0.2%
|
|
| 1970 | 2 |
0.3%
|
|
| 1972 | 1 |
0.2%
|
|
| 1974 | 1 |
0.2%
|
|
| 1976 | 2 |
0.3%
|
|
| 1978 | 1 |
0.2%
|
|
| 1979 | 2 |
0.3%
|
|
| 1980 | 6 |
0.9%
|
|
| 1981 | 1 |
0.2%
|
|
| 1982 | 1 |
0.2%
|
|
| 1983 | 2 |
0.3%
|
|
| 1985 | 3 |
0.5%
|
|
| 1986 | 4 |
0.6%
|
|
| 1987 | 4 |
0.6%
|
|
| 1988 | 5 |
0.8%
|
|
| 1989 | 2 |
0.3%
|
|
| 1990 | 15 |
2.3%
|
|
| 1991 | 3 |
0.5%
|
|
| 1992 | 4 |
0.6%
|
|
| 1993 | 5 |
0.8%
|
|
| 1994 | 2 |
0.3%
|
|
| 1995 | 12 |
1.8%
|
|
| 1996 | 10 |
1.5%
|
|
| 1997 | 7 |
1.1%
|
|
| 1998 | 10 |
1.5%
|
|
| 1999 | 15 |
2.3%
|
|
| 2000 | 26 |
4%
|
|
| 2001 | 6 |
0.9%
|
|
| 2002 | 16 |
2.5%
|
|
| 2003 | 10 |
1.5%
|
|
| 2004 | 10 |
1.5%
|
|
| 2005 | 22 |
3.4%
|
|
| 2006 | 11 |
1.7%
|
|
| 2007 | 14 |
2.2%
|
|
| 2008 | 20 |
3.1%
|
|
| 2009 | 15 |
2.3%
|
|
| 2010 | 38 |
5.8%
|
|
| 2011 | 22 |
3.4%
|
|
| 2012 | 32 |
4.9%
|
|
| 2013 | 20 |
3.1%
|
|
| 2014 | 26 |
4%
|
|
| 2015 | 36 |
5.5%
|
|
| 2016 | 41 |
6.3%
|
|
| 2017 | 55 |
8.4%
|
|
| 2018 | 50 |
7.7%
|
|
| 2019 | 60 |
9.2%
|