68% (2003)

65% (1977)

66% (2014)

61% (2010)

67% (1983)

61% (1992)

58% (1999)

61% (1997)

59% (1990)

68% (1989)

55% (1999)

61% (2013)

56% (2023)

60% (1979)

43% (1987)

55% (2018)

61% (1991)

46% (2016)

48% (2004)

62% (2008)