52% (1981)

70% (1984)

60% (1986)

85% (1966)

50% (1987)

100% (1984)

50% (1971)

50% (1988)

70% (1976)

0% (1986)

36% (1963)

50% (1974)

0% (1988)

58% (1965)

60% (1977)

55% (1988)

50% (1983)

60% (1989)

45% (1940)

0% (1984)