51% (2016)

55% (2014)

55% (2016)

74% (2012)

77% (2004)

63% (2010)

63% (2010)

65% (2002)

68% (2008)

69% (2000)

58% (2003)

69% (1984)

72% (2004)

66% (2004)

73% (1993)

55% (2000)

47% (1994)

77% (1997)

60% (1974)

64% (2005)