45% (1980)

65% (1969)

70% (1972)

50% (1969)

57% (1966)

45% (1970)

64% (1968)

61% (1972)

58% (1972)

64% (1970)

0% (1971)

42% (1981)

39% (1973)

48% (1971)

59% (1967)

50% (1972)

64% (1971)

57% (1971)

54% (1968)

63% (1967)