63% (2008)

47% (2007)

56% (2003)

64% (2006)

59% (2009)

56% (2007)

60% (2010)

64% (2007)

52% (2004)

53% (2005)

44% (2011)

73% (2012)

56% (2006)

60% (2011)

65% (2010)

65% (2008)

65% (2011)

44% (2009)

53% (2012)

64% (2007)