52% (2012)

55% (1961)

50% (1947)

27% (2007)

50% (1961)

50% (1960)

53% (1958)

57% (1973)

55% (1957)

67% (1974)

52% (1953)

56% (1970)

50% (1955)

60% (1958)

50% (1966)

60% (1953)