48% (1983)

45% (1985)

31% (1985)

44% (1984)

72% (1979)

71% (1973)

75% (1981)

62% (1974)

46% (1985)

50% (1962)

50% (1978)

76% (1986)

71% (1986)

62% (1963)

75% (1974)

60% (1979)

67% (1980)

70% (1978)

0% (1962)

62% (1969)