57% (1960)

61% (1958)

57% (1985)

64% (1960)

56% (2005)

49% (2007)

67% (1989)

61% (1996)

64% (1980)

60% (1968)

71% (1965)

55% (1999)

72% (1977)

57% (2003)

65% (1954)

62% (1992)

61% (1957)

56% (2018)

71% (1949)

58% (1994)