59% (2007)

68% (2004)

70% (2011)

53% (2006)

63% (2006)

70% (2009)

61% (2008)

75% (2002)

65% (2012)

60% (2009)

70% (2009)

64% (2009)

60% (2011)

59% (2010)

72% (2004)

67% (2006)

57% (2004)

62% (2011)

62% (2003)

63% (2001)