| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
0.2%
|
|
| 1968 | 2 |
0.5%
|
|
| 1970 | 5 |
1.2%
|
|
| 1973 | 1 |
0.2%
|
|
| 1974 | 1 |
0.2%
|
|
| 1975 | 3 |
0.7%
|
|
| 1976 | 3 |
0.7%
|
|
| 1977 | 1 |
0.2%
|
|
| 1978 | 3 |
0.7%
|
|
| 1979 | 1 |
0.2%
|
|
| 1980 | 7 |
1.7%
|
|
| 1981 | 2 |
0.5%
|
|
| 1982 | 4 |
1%
|
|
| 1983 | 1 |
0.2%
|
|
| 1984 | 1 |
0.2%
|
|
| 1985 | 5 |
1.2%
|
|
| 1986 | 6 |
1.4%
|
|
| 1987 | 4 |
1%
|
|
| 1989 | 5 |
1.2%
|
|
| 1990 | 7 |
1.7%
|
|
| 1991 | 1 |
0.2%
|
|
| 1993 | 6 |
1.4%
|
|
| 1994 | 1 |
0.2%
|
|
| 1995 | 1 |
0.2%
|
|
| 1996 | 3 |
0.7%
|
|
| 1997 | 6 |
1.4%
|
|
| 1998 | 13 |
3.1%
|
|
| 1999 | 8 |
1.9%
|
|
| 2000 | 20 |
4.8%
|
|
| 2001 | 9 |
2.2%
|
|
| 2002 | 6 |
1.4%
|
|
| 2003 | 6 |
1.4%
|
|
| 2004 | 8 |
1.9%
|
|
| 2005 | 6 |
1.4%
|
|
| 2006 | 7 |
1.7%
|
|
| 2007 | 7 |
1.7%
|
|
| 2008 | 6 |
1.4%
|
|
| 2009 | 6 |
1.4%
|
|
| 2010 | 10 |
2.4%
|
|
| 2011 | 5 |
1.2%
|
|
| 2012 | 8 |
1.9%
|
|
| 2013 | 22 |
5.3%
|
|
| 2014 | 27 |
6.5%
|
|
| 2015 | 38 |
9.2%
|
|
| 2016 | 44 |
10.6%
|
|
| 2017 | 78 |
18.8%
|
|
| Sysmiss | 4943 |