68% (2015)

60% (2010)

63% (2001)

56% (2005)

74% (2007)

64% (2003)

71% (1985)

58% (2011)

64% (2015)

61% (1996)

72% (1998)

65% (2018)

73% (1974)

77% (1995)

59% (1994)

72% (1985)

71% (1987)

58% (2008)

72% (2007)

79% (1959)