| Value | Category | Cases | |
|---|---|---|---|
| 1964 | 1 |
0.6%
|
|
| 1967 | 1 |
0.6%
|
|
| 1970 | 1 |
0.6%
|
|
| 1971 | 1 |
0.6%
|
|
| 1975 | 1 |
0.6%
|
|
| 1978 | 1 |
0.6%
|
|
| 1980 | 2 |
1.3%
|
|
| 1981 | 1 |
0.6%
|
|
| 1982 | 2 |
1.3%
|
|
| 1984 | 1 |
0.6%
|
|
| 1985 | 1 |
0.6%
|
|
| 1987 | 2 |
1.3%
|
|
| 1988 | 2 |
1.3%
|
|
| 1990 | 8 |
5.1%
|
|
| 1991 | 2 |
1.3%
|
|
| 1992 | 2 |
1.3%
|
|
| 1993 | 2 |
1.3%
|
|
| 1994 | 4 |
2.5%
|
|
| 1995 | 6 |
3.8%
|
|
| 1996 | 2 |
1.3%
|
|
| 1998 | 3 |
1.9%
|
|
| 1999 | 6 |
3.8%
|
|
| 2000 | 11 |
7%
|
|
| 2001 | 2 |
1.3%
|
|
| 2002 | 1 |
0.6%
|
|
| 2003 | 4 |
2.5%
|
|
| 2004 | 7 |
4.4%
|
|
| 2005 | 4 |
2.5%
|
|
| 2006 | 1 |
0.6%
|
|
| 2007 | 4 |
2.5%
|
|
| 2008 | 3 |
1.9%
|
|
| 2009 | 10 |
6.3%
|
|
| 2010 | 9 |
5.7%
|
|
| 2011 | 6 |
3.8%
|
|
| 2012 | 9 |
5.7%
|
|
| 2013 | 9 |
5.7%
|
|
| 2014 | 5 |
3.2%
|
|
| 2015 | 10 |
6.3%
|
|
| 2016 | 11 |
7%
|
|
| Sysmiss | 265 |