51% (1982)

49% (2010)

60% (2010)

50% (2010)

41% (2010)

52% (2000)

66% (1947)

45% (1983)

59% (2009)

72% (2004)

73% (1982)

62% (1983)

60% (2008)

57% (1993)

58% (2020)

53% (2013)

66% (1969)

47% (2010)

67% (2010)

58% (1990)