50% (1964)

71% (1981)

72% (1978)

55% (1986)

86% (1989)

79% (1987)

48% (1985)

37% (1984)

0% (1990)

86% (1990)

0% (1989)

40% (1987)

0% (1983)

74% (1993)

78% (1993)

20% (1987)

64% (1983)

0% (1970)

35% (1991)

60% (1993)