68% (1967)

57% (1966)

54% (1968)

59% (1967)

70% (1972)

45% (1969)

66% (2013)

63% (1967)

40% (1969)

39% (1973)

55% (1970)

45% (1970)

50% (1969)

74% (1981)

50% (1966)

64% (1970)

65% (1969)

45% (1980)

64% (1968)

80% (1971)