74% (1977)

74% (2011)

77% (2023)

75% (2022)

78% (2018)

70% (2006)

63% (2017)

62% (1998)

54% (2006)

69% (2002)

56% (1975)

61% (1980)

67% (2024)

57% (2023)

68% (2024)

70% (1998)

60% (2012)

65% (2006)

70% (1993)

58% (2006)