56% (2016)

59% (1982)

69% (1987)

62% (2007)

62% (1986)

63% (1987)

67% (1969)

80% (1991)

59% (2001)

53% (2015)

68% (2009)

51% (2011)

67% (2004)

67% (1986)

59% (2002)

64% (1983)

77% (1990)

76% (1995)

63% (1992)

49% (1997)