| Value | Category | Cases | |
|---|---|---|---|
| 1962 | 7 |
0.4%
|
|
| 1963 | 2 |
0.1%
|
|
| 1964 | 4 |
0.2%
|
|
| 1965 | 1 |
0.1%
|
|
| 1967 | 1 |
0.1%
|
|
| 1968 | 6 |
0.3%
|
|
| 1970 | 8 |
0.5%
|
|
| 1971 | 4 |
0.2%
|
|
| 1972 | 14 |
0.8%
|
|
| 1973 | 6 |
0.3%
|
|
| 1974 | 8 |
0.5%
|
|
| 1975 | 8 |
0.5%
|
|
| 1976 | 8 |
0.5%
|
|
| 1977 | 2 |
0.1%
|
|
| 1978 | 19 |
1.1%
|
|
| 1979 | 3 |
0.2%
|
|
| 1980 | 37 |
2.1%
|
|
| 1981 | 11 |
0.6%
|
|
| 1982 | 13 |
0.7%
|
|
| 1983 | 11 |
0.6%
|
|
| 1984 | 17 |
1%
|
|
| 1985 | 20 |
1.2%
|
|
| 1986 | 12 |
0.7%
|
|
| 1987 | 8 |
0.5%
|
|
| 1988 | 24 |
1.4%
|
|
| 1989 | 15 |
0.9%
|
|
| 1990 | 15 |
0.9%
|
|
| 1991 | 25 |
1.4%
|
|
| 1992 | 28 |
1.6%
|
|
| 1993 | 24 |
1.4%
|
|
| 1994 | 33 |
1.9%
|
|
| 1995 | 24 |
1.4%
|
|
| 1996 | 33 |
1.9%
|
|
| 1997 | 32 |
1.8%
|
|
| 1998 | 26 |
1.5%
|
|
| 1999 | 34 |
2%
|
|
| 2000 | 54 |
3.1%
|
|
| 2001 | 19 |
1.1%
|
|
| 2002 | 43 |
2.5%
|
|
| 2003 | 36 |
2.1%
|
|
| 2004 | 40 |
2.3%
|
|
| 2005 | 48 |
2.8%
|
|
| 2006 | 61 |
3.5%
|
|
| 2007 | 68 |
3.9%
|
|
| 2008 | 95 |
5.5%
|
|
| 2009 | 71 |
4.1%
|
|
| 2010 | 54 |
3.1%
|
|
| 2011 | 37 |
2.1%
|
|
| 2012 | 33 |
1.9%
|
|
| 2013 | 33 |
1.9%
|
|
| 2014 | 23 |
1.3%
|
|
| 2015 | 20 |
1.2%
|
|
| 2016 | 4 |
0.2%
|
|
| 9998 | Don't know | 456 |
26.2%
|