68% (1977)

64% (1975)

73% (1971)

71% (1976)

67% (1976)

61% (1976)

82% (1974)

60% (1975)

61% (1977)

66% (1972)

69% (1981)

53% (1973)

73% (1976)

53% (1977)

60% (1972)

0% (1979)

40% (2013)

0% (1973)

0% (1977)