| Value | Category | Cases | |
|---|---|---|---|
| 1970 | 1 |
0.6%
|
|
| 1973 | 1 |
0.6%
|
|
| 1974 | 1 |
0.6%
|
|
| 1975 | 3 |
1.7%
|
|
| 1976 | 1 |
0.6%
|
|
| 1977 | 1 |
0.6%
|
|
| 1978 | 1 |
0.6%
|
|
| 1979 | 1 |
0.6%
|
|
| 1980 | 2 |
1.1%
|
|
| 1981 | 1 |
0.6%
|
|
| 1983 | 1 |
0.6%
|
|
| 1985 | 1 |
0.6%
|
|
| 1986 | 1 |
0.6%
|
|
| 1987 | 1 |
0.6%
|
|
| 1988 | 1 |
0.6%
|
|
| 1989 | 2 |
1.1%
|
|
| 1990 | 3 |
1.7%
|
|
| 1991 | 1 |
0.6%
|
|
| 1992 | 1 |
0.6%
|
|
| 1993 | 1 |
0.6%
|
|
| 1994 | 1 |
0.6%
|
|
| 1995 | 1 |
0.6%
|
|
| 1996 | 2 |
1.1%
|
|
| 1997 | 2 |
1.1%
|
|
| 1998 | 3 |
1.7%
|
|
| 1999 | 1 |
0.6%
|
|
| 2000 | 3 |
1.7%
|
|
| 2002 | 2 |
1.1%
|
|
| 2003 | 1 |
0.6%
|
|
| 2004 | 2 |
1.1%
|
|
| 2006 | 1 |
0.6%
|
|
| 2007 | 1 |
0.6%
|
|
| 2008 | 2 |
1.1%
|
|
| 2009 | 1 |
0.6%
|
|
| 2010 | 9 |
5.1%
|
|
| 2011 | 3 |
1.7%
|
|
| 2012 | 6 |
3.4%
|
|
| 2013 | 4 |
2.3%
|
|
| 2014 | 9 |
5.1%
|
|
| 2015 | 17 |
9.7%
|
|
| 2016 | 40 |
22.9%
|
|
| 2017 | 38 |
21.7%
|
|
| Sysmiss | 5183 |