59% (1955)

48% (1989)

53% (1970)

40% (1990)

50% (1969)

61% (1949)

51% (1956)

74% (1967)

40% (1990)

53% (1966)

81% (1952)

56% (2007)

55% (1973)

79% (1969)

49% (1973)

64% (1956)

50% (1959)

37% (1993)

57% (1950)

50% (1959)