41% (1938)

54% (1986)

39% (1977)

50% (1972)

45% (1975)

52% (1982)

40% (1990)

54% (1959)

75% (1980)

0% (1982)

60% (1968)

48% (1959)

61% (1976)

0% (1978)

30% (1985)

46% (1980)

63% (1978)

33% (1974)

28% (1970)

34% (1987)