43% (1987)

47% (1988)

62% (1993)

60% (1990)

20% (1991)

57% (1989)

43% (1983)

50% (1987)

47% (1987)

20% (1992)

50% (1991)

20% (1985)

10% (1986)

0% (1987)

20% (1979)

20% (1991)

20% (1993)

0% (1992)

25% (1985)

60% (1986)