69% (1983)

50% (1988)

0% (1992)

56% (1984)

80% (1984)

59% (1988)

60% (1984)

69% (1990)

62% (1989)

33% (1987)

62% (1984)

70% (1987)

55% (1989)

70% (1993)

73% (1991)

66% (1988)

0% (1989)

70% (1991)

67% (1995)

60% (1988)