55% (1990)

57% (1993)

52% (1989)

0% (1993)

73% (1987)

67% (1992)

53% (1987)

51% (1988)

60% (1989)

66% (1992)

0% (1991)

0% (1996)

44% (1988)

70% (1986)

55% (1991)

68% (1988)

80% (1987)

72% (1988)

56% (1990)

53% (1995)