65% (1993)

75% (2004)

67% (2008)

63% (2013)

79% (2018)

56% (2002)

67% (2000)

67% (2009)

62% (2015)

72% (2003)

45% (1983)

69% (2010)

68% (1999)

65% (2006)

63% (1985)

58% (2015)

73% (1991)

66% (1998)

69% (2009)

64% (2018)