40% (1970)

49% (1991)

60% (1969)

45% (1982)

50% (1960)

46% (1995)

56% (1960)

46% (1988)

64% (1988)

50% (1987)

59% (1987)

53% (1989)

48% (1988)

74% (1958)

50% (1955)

65% (1976)

68% (1956)

63% (1979)

32% (1990)

0% (1980)