Value | Category | Cases | |
---|---|---|---|
-2 | No answer | 210 |
20.5%
|
1937 | 2 |
0.2%
|
|
1938 | 1 |
0.1%
|
|
1939 | 1 |
0.1%
|
|
1940 | 1 |
0.1%
|
|
1941 | 1 |
0.1%
|
|
1942 | 5 |
0.5%
|
|
1943 | 4 |
0.4%
|
|
1944 | 3 |
0.3%
|
|
1945 | 5 |
0.5%
|
|
1946 | 1 |
0.1%
|
|
1947 | 6 |
0.6%
|
|
1948 | 4 |
0.4%
|
|
1949 | 10 |
1%
|
|
1950 | 7 |
0.7%
|
|
1951 | 5 |
0.5%
|
|
1952 | 2 |
0.2%
|
|
1953 | 10 |
1%
|
|
1954 | 12 |
1.2%
|
|
1955 | 14 |
1.4%
|
|
1956 | 11 |
1.1%
|
|
1957 | 11 |
1.1%
|
|
1958 | 9 |
0.9%
|
|
1959 | 11 |
1.1%
|
|
1960 | 18 |
1.8%
|
|
1961 | 17 |
1.7%
|
|
1962 | 8 |
0.8%
|
|
1963 | 19 |
1.9%
|
|
1964 | 10 |
1%
|
|
1965 | 14 |
1.4%
|
|
1966 | 9 |
0.9%
|
|
1967 | 16 |
1.6%
|
|
1968 | 15 |
1.5%
|
|
1969 | 15 |
1.5%
|
|
1970 | 13 |
1.3%
|
|
1971 | 10 |
1%
|
|
1972 | 14 |
1.4%
|
|
1973 | 8 |
0.8%
|
|
1974 | 9 |
0.9%
|
|
1975 | 16 |
1.6%
|
|
1976 | 10 |
1%
|
|
1977 | 8 |
0.8%
|
|
1978 | 4 |
0.4%
|
|
1979 | 13 |
1.3%
|
|
1980 | 11 |
1.1%
|
|
1981 | 4 |
0.4%
|
|
1982 | 18 |
1.8%
|
|
1983 | 13 |
1.3%
|
|
1984 | 13 |
1.3%
|
|
1985 | 14 |
1.4%
|
|
1986 | 13 |
1.3%
|
|
1987 | 20 |
2%
|
|
1988 | 18 |
1.8%
|
|
1989 | 20 |
2%
|
|
1990 | 15 |
1.5%
|
|
1991 | 20 |
2%
|
|
1992 | 19 |
1.9%
|
|
1993 | 17 |
1.7%
|
|
1994 | 29 |
2.8%
|
|
1995 | 37 |
3.6%
|
|
1996 | 30 |
2.9%
|
|
1997 | 31 |
3%
|
|
1998 | 36 |
3.5%
|
|
1999 | 25 |
2.4%
|
|
2000 | 11 |
1.1%
|
|
2001 | 17 |
1.7%
|