49% (1981)

55% (1966)

33% (1986)

49% (1978)

40% (1991)

47% (1990)

60% (1962)

52% (1954)

53% (1972)

65% (1978)

49% (1955)

56% (1982)

42% (1985)

50% (1990)

61% (1968)

53% (1973)

56% (1965)

59% (1935)

53% (1990)

59% (1987)