77% (1973)

64% (1975)

62% (1959)

60% (1958)

61% (1959)

60% (1979)

70% (1970)

70% (1969)

70% (1971)

70% (1984)

95% (1976)

66% (1967)

0% (1966)

0% (1968)

80% (1967)