76% (1997)

79% (1999)

72% (1997)

78% (1994)

68% (1998)

70% (2003)

76% (2000)

70% (1999)

72% (1996)

64% (2002)

68% (2001)

60% (2000)

48% (1998)

67% (2000)

58% (1996)

53% (2005)

57% (2006)

51% (2006)

58% (2004)

80% (1998)