70% (1972)

77% (1969)

68% (1979)

76% (2001)

73% (1962)

75% (2005)

69% (1967)

68% (1977)

70% (1976)

62% (1975)

70% (1994)

61% (1970)

68% (1968)

73% (1999)

10% (1986)

60% (1984)

69% (1966)

58% (1972)

60% (1979)

63% (1963)