50% (1981)

50% (1977)

67% (1976)

60% (1986)

60% (1975)

46% (1984)

55% (1978)

72% (1973)

60% (1980)

70% (1968)

52% (1980)

64% (1980)

0% (1971)

57% (1972)

50% (1975)

60% (1982)

58% (1970)

68% (1962)

52% (1975)

74% (1968)