72% (2018)

64% (1983)

69% (2023)

71% (2016)

76% (2017)

64% (2013)

67% (2010)

69% (2005)

74% (2010)

60% (2008)

64% (2004)

68% (1993)

65% (1994)

47% (1975)

54% (2013)

68% (2009)

76% (2024)

56% (2003)

69% (2003)

61% (2005)