77% (1982)

65% (1978)

71% (1967)

0% (1976)

69% (1984)

43% (1984)

58% (1985)

60% (1965)

57% (1991)

63% (1969)

58% (1976)

42% (1990)

56% (1973)

59% (1984)

50% (1989)

59% (1975)

63% (1979)

48% (1967)

52% (1982)

48% (1988)