48% (1962)

45% (1947)

36% (1961)

60% (1965)

60% (1950)

59% (1971)

51% (1959)

53% (1957)

70% (1953)

59% (1967)

55% (1967)

60% (1955)

40% (2011)

55% (1974)

52% (1951)

64% (1976)

70% (1948)

56% (1965)

61% (1970)

49% (1969)