54% (1976)

62% (1965)

73% (1970)

45% (1995)

30% (1976)

60% (1990)

59% (1975)

41% (1985)

60% (1970)

36% (1985)

56% (1982)

56% (2010)

64% (1988)

63% (1979)

27% (1971)

55% (1960)

75% (1967)

55% (1970)

48% (1991)

37% (1973)