| Value | Category | Cases | |
|---|---|---|---|
| -4 | Not asked | 0 |
0%
|
| -2 | NA | 0 |
0%
|
| -1 | DK | 0 |
0%
|
| 1926 | 6 |
0.5%
|
|
| 1927 | 4 |
0.3%
|
|
| 1928 | 5 |
0.4%
|
|
| 1929 | 6 |
0.5%
|
|
| 1930 | 9 |
0.8%
|
|
| 1931 | 6 |
0.5%
|
|
| 1932 | 10 |
0.9%
|
|
| 1933 | 7 |
0.6%
|
|
| 1934 | 14 |
1.2%
|
|
| 1935 | 13 |
1.1%
|
|
| 1936 | 4 |
0.3%
|
|
| 1937 | 11 |
1%
|
|
| 1938 | 10 |
0.9%
|
|
| 1939 | 8 |
0.7%
|
|
| 1940 | 16 |
1.4%
|
|
| 1941 | 9 |
0.8%
|
|
| 1942 | 16 |
1.4%
|
|
| 1943 | 17 |
1.5%
|
|
| 1944 | 10 |
0.9%
|
|
| 1945 | 12 |
1%
|
|
| 1946 | 30 |
2.6%
|
|
| 1947 | 13 |
1.1%
|
|
| 1948 | 16 |
1.4%
|
|
| 1949 | 18 |
1.6%
|
|
| 1950 | 24 |
2.1%
|
|
| 1951 | 11 |
1%
|
|
| 1952 | 14 |
1.2%
|
|
| 1953 | 22 |
1.9%
|
|
| 1954 | 22 |
1.9%
|
|
| 1955 | 29 |
2.5%
|
|
| 1956 | 24 |
2.1%
|
|
| 1957 | 21 |
1.8%
|
|
| 1958 | 27 |
2.4%
|
|
| 1959 | 23 |
2%
|
|
| 1960 | 31 |
2.7%
|
|
| 1961 | 26 |
2.3%
|
|
| 1962 | 28 |
2.4%
|
|
| 1963 | 33 |
2.9%
|
|
| 1964 | 36 |
3.1%
|
|
| 1965 | 37 |
3.2%
|
|
| 1966 | 26 |
2.3%
|
|
| 1967 | 33 |
2.9%
|
|
| 1968 | 33 |
2.9%
|
|
| 1969 | 39 |
3.4%
|
|
| 1970 | 29 |
2.5%
|
|
| 1971 | 37 |
3.2%
|
|
| 1972 | 35 |
3.1%
|
|
| 1973 | 24 |
2.1%
|
|
| 1974 | 27 |
2.4%
|
|
| 1975 | 42 |
3.7%
|
|
| 1976 | 50 |
4.4%
|
|
| 1977 | 45 |
3.9%
|
|
| 1978 | 41 |
3.6%
|
|
| 1979 | 4 |
0.3%
|