68% (1969)

70% (1969)

50% (1966)

60% (1958)

56% (1969)

70% (1972)

63% (1973)

61% (1962)

65% (1967)

59% (1967)

58% (1990)

59% (1974)

57% (1964)

33% (1971)

50% (1974)

50% (1990)

50% (1961)

62% (1962)

56% (1971)

42% (1971)