75% (1970)

72% (1966)

57% (1984)

66% (1964)

70% (1960)

61% (1968)

61% (1960)

59% (1965)

72% (1962)

60% (1963)

70% (1961)

66% (1959)

48% (1970)

56% (1969)

47% (1977)

55% (1965)

58% (1967)

50% (1979)

40% (1969)