71% (2018)

71% (2023)

75% (2015)

61% (2016)

66% (2011)

69% (2006)

80% (1980)

58% (1990)

73% (1979)

57% (2015)

56% (2011)

67% (1972)

76% (1969)

61% (1988)

44% (2009)

71% (1967)

66% (1977)

55% (2006)

61% (1981)

68% (1974)