60% (2011)

60% (2010)

59% (2012)

73% (2012)

34% (2005)

46% (2008)

61% (2007)

56% (2003)

59% (2009)

32% (2006)

61% (2004)

48% (2007)

62% (2010)

52% (2007)

52% (2009)

59% (2009)

56% (2007)

46% (2007)

44% (2011)

65% (2008)