0% (1980)

60% (1989)

90% (1984)

58% (1991)

80% (1972)

90% (1975)

76% (1980)

80% (1967)

90% (1982)

80% (1980)

0% (1975)

0% (1989)

0% (1992)

80% (1994)

90% (1983)

77% (1983)

77% (1987)

70% (1994)

70% (1982)

60% (1969)