76% (1996)

71% (1990)

76% (1997)

60% (1997)

75% (1999)

67% (1992)

62% (2002)

66% (1993)

74% (2002)

60% (1993)

60% (1996)

40% (1996)

70% (1998)

64% (1998)

58% (1995)

60% (2000)

58% (1998)

68% (1993)

60% (1994)

64% (2002)