| Value | Category | Cases | |
|---|---|---|---|
| 1928 | 2 |
0.2%
|
|
| 1932 | 2 |
0.2%
|
|
| 1933 | 3 |
0.3%
|
|
| 1935 | 1 |
0.1%
|
|
| 1938 | 2 |
0.2%
|
|
| 1939 | 2 |
0.2%
|
|
| 1941 | 4 |
0.4%
|
|
| 1942 | 4 |
0.4%
|
|
| 1947 | 11 |
1.1%
|
|
| 1948 | 2 |
0.2%
|
|
| 1949 | 5 |
0.5%
|
|
| 1950 | 10 |
1%
|
|
| 1951 | 6 |
0.6%
|
|
| 1952 | 4 |
0.4%
|
|
| 1953 | 19 |
1.9%
|
|
| 1954 | 19 |
1.9%
|
|
| 1955 | 19 |
1.9%
|
|
| 1956 | 14 |
1.4%
|
|
| 1957 | 13 |
1.3%
|
|
| 1958 | 17 |
1.7%
|
|
| 1959 | 12 |
1.2%
|
|
| 1960 | 15 |
1.5%
|
|
| 1961 | 8 |
0.8%
|
|
| 1962 | 15 |
1.5%
|
|
| 1963 | 3 |
0.3%
|
|
| 1964 | 15 |
1.5%
|
|
| 1965 | 7 |
0.7%
|
|
| 1966 | 6 |
0.6%
|
|
| 1967 | 4 |
0.4%
|
|
| 1968 | 3 |
0.3%
|
|
| 1969 | 2 |
0.2%
|
|
| 1970 | 2 |
0.2%
|
|
| 1971 | 2 |
0.2%
|
|
| 1973 | 4 |
0.4%
|
|
| 1974 | 6 |
0.6%
|
|
| 1975 | 6 |
0.6%
|
|
| 1976 | 8 |
0.8%
|
|
| 1977 | 2 |
0.2%
|
|
| 1978 | 8 |
0.8%
|
|
| 1979 | 9 |
0.9%
|
|
| 1980 | 33 |
3.3%
|
|
| 1981 | 42 |
4.2%
|
|
| 1982 | 32 |
3.2%
|
|
| 1983 | 46 |
4.6%
|
|
| 1984 | 46 |
4.6%
|
|
| 1985 | 74 |
7.4%
|
|
| 1986 | 56 |
5.6%
|
|
| 1987 | 52 |
5.2%
|
|
| 1988 | 32 |
3.2%
|
|
| 1989 | 23 |
2.3%
|
|
| 1990 | 28 |
2.8%
|
|
| 1991 | 22 |
2.2%
|
|
| 1992 | 10 |
1%
|
|
| 1993 | 16 |
1.6%
|
|
| 1994 | 7 |
0.7%
|
|
| 1995 | 20 |
2%
|
|
| 1996 | 21 |
2.1%
|
|
| 1997 | 8 |
0.8%
|
|
| 1998 | 9 |
0.9%
|
|
| 1999 | 10 |
1%
|
|
| 2000 | 9 |
0.9%
|
|
| 2001 | 13 |
1.3%
|
|
| 2002 | 18 |
1.8%
|
|
| 2003 | 12 |
1.2%
|
|
| 2004 | 24 |
2.4%
|
|
| 2005 | 10 |
1%
|
|
| 2006 | 4 |
0.4%
|
|
| 2007 | 11 |
1.1%
|
|
| 2008 | 8 |
0.8%
|
|
| 2009 | 7 |
0.7%
|
|
| 9999 | 9999. Don't know | 0 |
0%
|