71% (2012)

75% (1979)

73% (1989)

58% (1975)

78% (1989)

70% (1973)

62% (1979)

64% (1976)

50% (1995)

70% (1969)

53% (1980)

62% (1970)

55% (1981)

68% (1978)

73% (1980)

56% (2002)

50% (1975)

67% (1977)

66% (1984)

54% (2018)