62% (1972)

50% (1972)

71% (1972)

60% (1973)

70% (1982)

59% (1974)

80% (1973)

72% (1975)

62% (1975)

73% (1974)

0% (1976)

68% (1976)

60% (1976)

60% (1978)

40% (1974)

0% (1975)

100% (1978)