60% (1987)

73% (1989)

67% (1991)

0% (1993)

76% (1991)

63% (1996)

61% (1988)

60% (1988)

71% (1990)

55% (1991)

56% (1996)

70% (1988)

61% (1986)

45% (1995)

75% (1989)

70% (1995)

70% (1990)

50% (1995)

80% (1988)

48% (1992)