76% (1996)

59% (1993)

76% (1997)

71% (1990)

75% (1999)

66% (1992)

60% (1997)

62% (2002)

74% (2002)

70% (1998)

58% (1997)

64% (2002)

58% (1995)

40% (1996)

67% (1993)

64% (1998)

66% (1993)

60% (1996)

55% (1995)

63% (1991)