65% (1967)

60% (1968)

0% (1980)

52% (1982)

55% (1973)

67% (1988)

78% (1987)

55% (1981)

53% (1985)

54% (1975)

61% (1979)

51% (1987)

43% (1978)

59% (1983)

61% (1965)

59% (1971)

55% (1973)

45% (1976)

55% (1974)

56% (1965)