70% (1974)

73% (1977)

75% (2001)

69% (1975)

62% (1973)

68% (1985)

64% (1972)

64% (1970)

73% (1983)

67% (1973)

60% (1974)

56% (1974)

61% (1977)

64% (1987)

53% (1984)

67% (1974)

61% (1994)

47% (1980)

0% (1973)

70% (1973)