69% (1968)

67% (2010)

68% (1993)

83% (2011)

56% (2005)

80% (2002)

79% (2006)

88% (1985)

72% (2002)

83% (2015)

49% (1990)

80% (1986)

69% (1985)

83% (2009)

75% (2007)

69% (2010)

63% (1987)

63% (1991)

75% (2017)

79% (2021)