64% (1966)

40% (1973)

63% (1964)

35% (1951)

70% (1961)

58% (1967)

49% (1963)

75% (1968)

71% (1952)

57% (1973)

70% (1966)

28% (1968)

61% (1962)

80% (1974)

32% (1959)

40% (1969)

49% (1972)

70% (1970)

75% (1968)

90% (1966)