71% (1981)

74% (1993)

50% (1964)

78% (1987)

72% (1978)

64% (1983)

0% (1989)

55% (1986)

48% (1985)

37% (1984)

40% (1987)

86% (1990)

50% (1988)

20% (1987)

0% (1983)

83% (1989)

60% (1993)

0% (1990)

78% (1993)

0% (1982)