65% (1962)

64% (1965)

68% (1962)

58% (1964)

58% (1975)

50% (1995)

60% (1981)

63% (1966)

60% (1967)

57% (1979)

56% (1970)

60% (1966)

55% (1970)

47% (1995)

61% (1967)

60% (1980)

42% (1970)

20% (1981)

58% (1970)

40% (1977)