65% (1963)

60% (1964)

66% (1976)

54% (1971)

56% (1968)

60% (1985)

58% (1978)

58% (1972)

61% (1980)

60% (1962)

40% (1960)

43% (1972)

64% (1965)

57% (1966)

80% (1934)

58% (1935)

55% (1961)

55% (1968)

62% (1975)

56% (1999)