57% (1950)

54% (2023)

53% (1981)

59% (1963)

66% (2001)

52% (1977)

58% (1964)

53% (1984)

54% (1968)

64% (2011)

50% (2011)

41% (1982)

41% (1989)

72% (1960)

49% (1981)

73% (1989)

67% (1969)

50% (1961)

62% (1964)

59% (2023)