76% (2006)

68% (2015)

66% (2014)

65% (1999)

63% (2005)

57% (1995)

69% (1993)

57% (2005)

70% (2011)

68% (2008)

68% (1994)

69% (1993)

66% (2010)

60% (1993)

63% (2002)

66% (1997)

76% (1995)

48% (2002)

40% (1997)

69% (1999)