77% (1971)

63% (1963)

40% (1961)

35% (1966)

80% (1957)

80% (1972)

69% (1964)

0% (1980)

40% (1959)

50% (1960)

40% (1981)

40% (1982)

0% (1977)

0% (1972)

70% (1974)

0% (1969)

90% (1965)

50% (1958)

35% (1975)

10% (1980)