70% (1974)

64% (1972)

75% (2001)

73% (1977)

69% (1975)

62% (1973)

68% (1985)

64% (1970)

67% (1973)

67% (1974)

65% (1987)

74% (1983)

61% (1977)

60% (1974)

54% (1984)

47% (1980)

60% (1994)

70% (1973)

56% (1974)

0% (1976)