64% (2022)

73% (2021)

61% (2023)

56% (2020)

64% (2019)

60% (2019)

72% (2016)

68% (2015)

74% (2013)

71% (2012)

58% (2014)

67% (1984)

73% (2010)

58% (2009)

61% (2009)

69% (1994)

59% (2005)

76% (1992)

83% (1991)

71% (2009)