63% (1978)

58% (1985)

50% (1962)

45% (1986)

48% (1970)

63% (1961)

63% (1979)

63% (1967)

54% (1987)

70% (1973)

43% (1986)

63% (1966)

63% (1969)

0% (1991)

60% (1978)

52% (1985)

58% (1981)

53% (1988)

70% (1955)

52% (1980)