73% (1989)

68% (1991)

61% (1988)

76% (1991)

61% (1987)

63% (1996)

71% (1990)

56% (1996)

54% (1991)

0% (1993)

61% (1986)

70% (1988)

70% (1995)

45% (1995)

60% (1988)

80% (1988)

42% (1987)

75% (1989)

50% (1995)

70% (1990)