78% (1987)

71% (1981)

74% (1993)

86% (1990)

0% (1982)

83% (1989)

0% (1990)

55% (1986)

63% (1983)

0% (1989)

40% (1987)

50% (1988)

78% (1993)

37% (1984)

0% (1987)

0% (1984)

70% (1984)

35% (1991)

0% (1970)