62% (2001)

78% (2004)

68% (1999)

74% (1998)

68% (2010)

66% (2008)

69% (1992)

66% (1992)

68% (2001)

70% (2006)

67% (2010)

63% (2009)

40% (2006)

64% (1998)

53% (1998)

68% (2004)

59% (2006)

57% (2004)

59% (2003)

61% (1996)