67% (1982)

90% (1988)

80% (1977)

60% (1980)

57% (1972)

80% (1984)

77% (1990)

80% (1983)

93% (1990)

90% (1988)

90% (1987)

63% (1977)

90% (1984)

70% (1985)

90% (1968)

64% (1983)

70% (1982)

77% (1983)

58% (1991)

66% (1986)