68% (1969)

70% (1969)

70% (1972)

56% (1971)

63% (1973)

59% (1967)

57% (1971)

63% (1967)

50% (1968)

38% (1971)

0% (1965)

50% (1959)

59% (1974)

60% (1989)

57% (1964)

50% (1951)

56% (1969)

60% (1958)

62% (1962)

0% (1959)