71% (2003)

75% (2001)

68% (2003)

76% (2001)

78% (2003)

60% (2002)

66% (2000)

66% (1999)

63% (2001)

64% (2002)

58% (2001)

58% (2002)

54% (2001)

57% (2003)

61% (2002)

59% (2002)

63% (2001)

55% (2002)

59% (2000)

58% (2000)