62% (1965)

49% (1987)

58% (1983)

67% (1960)

70% (2006)

30% (1976)

56% (2010)

74% (1970)

50% (1984)

60% (1990)

59% (1975)

65% (1984)

60% (1970)

27% (1971)

41% (1985)

63% (1966)

58% (1981)

69% (1997)

73% (1988)

45% (1992)