70% (1981)

60% (1966)

80% (1985)

50% (1981)

70% (1979)

43% (1989)

0% (1970)

60% (1985)

50% (1970)

0% (1987)

90% (1986)

90% (1965)

0% (1968)

70% (1990)

60% (1969)

60% (1989)

60% (1974)

40% (1965)

60% (1974)

50% (1986)