68% (2020)

63% (2017)

68% (2018)

64% (2001)

45% (1970)

65% (2016)

80% (2015)

44% (2004)

85% (1975)

73% (2001)

84% (2005)

74% (1999)

60% (1975)

79% (2010)

56% (2006)

72% (2013)

62% (1988)

77% (1982)

81% (2006)

100% (1975)