0% (1977)

35% (1975)

53% (1980)

49% (1981)

70% (1958)

55% (1986)

56% (1990)

50% (1989)

48% (1989)

80% (1968)

0% (1973)

59% (1983)

0% (1958)

60% (1985)

0% (1972)

50% (1987)

60% (1984)

48% (1984)

60% (1979)

70% (1969)