64% (1978)

71% (1996)

64% (1972)

66% (1989)

68% (1989)

65% (2015)

68% (1959)

70% (1993)

77% (1997)

64% (1957)

56% (1980)

67% (1968)

76% (1957)

64% (1983)

78% (1977)

73% (1975)

67% (1982)

79% (1959)

72% (2015)

50% (1995)