60% (1974)

40% (1971)

0% (1981)

0% (1990)

72% (1976)

70% (1975)

0% (1980)

50% (1960)

70% (1977)

55% (1979)

50% (1991)

60% (1987)

0% (1971)

45% (1979)

0% (1974)

32% (1984)

52% (1986)

62% (1985)

62% (1985)

0% (1980)