71% (1971)

73% (1981)

76% (1970)

52% (1974)

72% (1982)

74% (1970)

65% (1978)

59% (1984)

58% (1983)

65% (1988)

50% (1984)

44% (1972)

58% (2014)

63% (1973)

64% (1979)

47% (2005)

0% (1983)

50% (1976)

56% (2014)

10% (1964)