44% (1983)

62% (1971)

42% (1987)

53% (1973)

59% (1984)

66% (1969)

53% (1967)

34% (1984)

56% (1985)

56% (1970)

51% (1971)

32% (1970)

18% (1971)

55% (1986)

60% (1968)

42% (1985)

48% (1969)

34% (1988)

61% (1975)

55% (1969)