68% (1969)

70% (1969)

51% (1966)

60% (1958)

65% (1967)

56% (1969)

61% (1962)

33% (1971)

63% (1973)

56% (1971)

70% (1972)

58% (1990)

50% (1974)

52% (1962)

42% (1971)

59% (1967)

50% (1968)

62% (1966)

51% (1955)

62% (1962)