63% (1974)

56% (1975)

53% (1971)

71% (1965)

0% (1965)

61% (1965)

54% (1961)

61% (1963)

55% (1967)

44% (1973)

50% (1974)

65% (1972)

51% (1970)

58% (1977)

56% (1972)

37% (1970)

44% (1967)

62% (1966)

47% (1968)

64% (1977)