67% (1983)

69% (1972)

62% (1975)

59% (1973)

66% (1973)

60% (1976)

59% (1971)

66% (1973)

0% (1972)

71% (1976)

73% (1982)

57% (1980)

50% (1977)

62% (1979)

61% (1980)

60% (1972)

68% (1972)

54% (1974)

0% (1973)

42% (1978)