80% (1991)

71% (1982)

60% (1969)

80% (1984)

60% (1980)

70% (1978)

70% (1983)

80% (1982)

83% (1984)

85% (1988)

80% (1980)

67% (1979)

70% (1978)

93% (1990)

90% (1987)

44% (1980)

0% (1989)

82% (1988)

80% (1980)

80% (1973)