56% (1972)

61% (1972)

42% (1984)

59% (1979)

50% (1980)

67% (1983)

50% (1968)

65% (1986)

50% (1971)

59% (1971)

47% (1978)

64% (1981)

60% (1969)

53% (1980)

51% (1968)

74% (1964)

48% (1979)

70% (1976)

55% (1984)

0% (1967)