73% (1973)

70% (1986)

69% (1963)

61% (1994)

66% (1964)

69% (1965)

69% (1978)

71% (1962)

63% (1975)

63% (1964)

61% (1966)

70% (1981)

62% (1978)

67% (1972)

63% (1977)

72% (1982)

61% (1965)

62% (1972)

40% (1969)

60% (1966)