73% (1989)

61% (1987)

68% (1991)

63% (1996)

76% (1991)

61% (1988)

71% (1990)

61% (1986)

54% (1991)

70% (1988)

70% (1990)

64% (1995)

56% (1996)

75% (1989)

80% (1988)

0% (1993)

58% (1995)

43% (1992)

60% (1988)

42% (1987)