50% (1984)

69% (1979)

67% (1976)

56% (1967)

57% (1979)

58% (1980)

60% (1969)

69% (1971)

60% (1977)

66% (1981)

52% (2010)

62% (1978)

71% (1969)

60% (1966)

62% (1982)

65% (1979)

0% (1968)

63% (1970)

65% (2016)

64% (1976)