59% (1985)

56% (1991)

47% (1984)

66% (1990)

42% (1986)

59% (1983)

38% (1986)

59% (1984)

57% (1991)

68% (1985)

51% (1987)

54% (1985)

56% (1979)

20% (1983)

50% (1988)

63% (1988)

40% (1986)

69% (1987)

0% (1994)

40% (1998)