73% (1987)

68% (1986)

69% (1998)

64% (1984)

68% (1990)

69% (1987)

59% (1998)

66% (1987)

49% (1987)

67% (1990)

60% (1987)

65% (1987)

68% (1992)

63% (1985)

53% (1988)

63% (1994)

58% (1988)

56% (1985)

56% (1989)

60% (1985)