44% (2011)

59% (2004)

62% (2009)

57% (2003)

67% (2003)

58% (2006)

53% (2007)

52% (2004)

53% (2005)

44% (2009)

60% (2011)

51% (2008)

59% (2010)

66% (2011)

52% (2010)

61% (2009)

59% (2012)

63% (2008)

48% (2006)

47% (2007)