68% (1969)

70% (1972)

61% (1962)

70% (1969)

59% (1967)

63% (1973)

50% (1966)

60% (1958)

56% (1969)

56% (1971)

57% (1968)

50% (1958)

50% (1974)

57% (1964)

51% (1955)

50% (1964)

50% (1990)

68% (1968)

58% (1990)

0% (1967)