70% (1993)

70% (1983)

75% (1977)

68% (1975)

70% (1984)

65% (1986)

50% (1974)

80% (1981)

50% (1977)

65% (1983)

90% (1986)

0% (1984)

76% (1980)

70% (1985)

50% (1991)

73% (1984)

70% (1978)

67% (1973)

75% (1989)

0% (1975)