81% (1989)

74% (1977)

48% (2005)

77% (1971)

75% (1970)

58% (1984)

83% (1977)

73% (1969)

60% (1984)

66% (2003)

73% (1979)

80% (1978)

50% (1976)

62% (1983)

67% (1986)

70% (1971)

0% (1959)

100% (1988)

52% (1980)

0% (1979)