| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| 1922 | 1 |
0%
|
|
| 1929 | 1 |
0%
|
|
| 1930 | 3 |
0.1%
|
|
| 1931 | 2 |
0.1%
|
|
| 1932 | 3 |
0.1%
|
|
| 1933 | 3 |
0.1%
|
|
| 1934 | 3 |
0.1%
|
|
| 1935 | 2 |
0.1%
|
|
| 1936 | 4 |
0.1%
|
|
| 1937 | 9 |
0.3%
|
|
| 1938 | 9 |
0.3%
|
|
| 1939 | 5 |
0.2%
|
|
| 1940 | 13 |
0.4%
|
|
| 1941 | 1 |
0%
|
|
| 1942 | 9 |
0.3%
|
|
| 1943 | 12 |
0.4%
|
|
| 1944 | 5 |
0.2%
|
|
| 1945 | 13 |
0.4%
|
|
| 1946 | 17 |
0.5%
|
|
| 1947 | 17 |
0.5%
|
|
| 1948 | 11 |
0.3%
|
|
| 1949 | 21 |
0.7%
|
|
| 1950 | 29 |
0.9%
|
|
| 1951 | 28 |
0.9%
|
|
| 1952 | 26 |
0.8%
|
|
| 1953 | 21 |
0.7%
|
|
| 1954 | 39 |
1.2%
|
|
| 1955 | 33 |
1%
|
|
| 1956 | 31 |
1%
|
|
| 1957 | 40 |
1.2%
|
|
| 1958 | 31 |
1%
|
|
| 1959 | 25 |
0.8%
|
|
| 1960 | 33 |
1%
|
|
| 1961 | 33 |
1%
|
|
| 1962 | 34 |
1.1%
|
|
| 1963 | 16 |
0.5%
|
|
| 1964 | 19 |
0.6%
|
|
| 1965 | 15 |
0.5%
|
|
| 1966 | 22 |
0.7%
|
|
| 1967 | 22 |
0.7%
|
|
| 1968 | 46 |
1.4%
|
|
| 1969 | 35 |
1.1%
|
|
| 1970 | 45 |
1.4%
|
|
| 1971 | 47 |
1.5%
|
|
| 1972 | 70 |
2.2%
|
|
| 1973 | 64 |
2%
|
|
| 1974 | 77 |
2.4%
|
|
| 1975 | 70 |
2.2%
|
|
| 1976 | 101 |
3.2%
|
|
| 1977 | 114 |
3.6%
|
|
| 1978 | 135 |
4.2%
|
|
| 1979 | 144 |
4.5%
|
|
| 1980 | 136 |
4.2%
|
|
| 1981 | 155 |
4.8%
|
|
| 1982 | 217 |
6.8%
|
|
| 1983 | 207 |
6.5%
|
|
| 1984 | 226 |
7%
|
|
| 1985 | 191 |
6%
|
|
| 1986 | 157 |
4.9%
|
|
| 1987 | 130 |
4.1%
|
|
| 1988 | 93 |
2.9%
|
|
| 1989 | 47 |
1.5%
|
|
| 1990 | 26 |
0.8%
|
|
| 1991 | 8 |
0.2%
|
|
| 1992 | 1 |
0%
|
|
| 1993 | 2 |
0.1%
|
|
| 1996 | 1 |
0%
|