48% (1970)

60% (1968)

64% (1965)

58% (1964)

56% (1972)

62% (1965)

55% (1986)

56% (1966)

48% (1981)

55% (1973)

71% (1957)

54% (1966)

59% (1965)

57% (1955)

55% (1967)

36% (1969)

77% (1966)

53% (1966)

42% (1973)

56% (1964)