74% (2004)

71% (2015)

64% (2013)

63% (2004)

59% (2014)

60% (2006)

62% (2013)

64% (2002)

57% (2010)

69% (2008)

69% (2015)

51% (2016)

67% (2009)

62% (2008)

55% (2012)

60% (2003)

46% (2000)

67% (2005)

44% (2002)

60% (1998)