63% (2001)

77% (2004)

68% (2010)

65% (2008)

68% (1999)

74% (1998)

69% (1992)

67% (2010)

70% (2006)

62% (2009)

67% (2001)

41% (2005)

67% (2002)

58% (2003)

68% (2004)

59% (1999)

71% (2001)

61% (2004)

53% (1998)

35% (2003)