48% (1946)

42% (1956)

50% (1980)

62% (1959)

60% (1967)

35% (1960)

77% (1966)

27% (1985)

55% (1964)

20% (1977)

42% (1980)

49% (1978)

40% (1991)

51% (1988)

51% (1967)

50% (1979)

37% (1959)

44% (1988)

38% (1973)

74% (1974)