56% (1971)

40% (1975)

60% (1982)

59% (1964)

41% (1992)

80% (1965)

33% (1984)

27% (1986)

55% (1968)

35% (1974)

56% (1971)

55% (1972)

0% (1991)

54% (1983)

63% (1972)

44% (1975)

62% (1980)

46% (1970)

43% (1979)

54% (1989)