72% (1978)

76% (1962)

78% (2015)

67% (1962)

64% (2009)

75% (1981)

50% (1960)

72% (2015)

78% (1970)

30% (1964)

58% (1988)

64% (1983)

68% (1998)

60% (1959)

42% (1957)

62% (1982)

78% (1991)

70% (2011)

68% (1979)

79% (1959)