72% (1978)

60% (2025)

71% (2023)

53% (2010)

51% (2000)

70% (2021)

65% (2015)

59% (2010)

64% (2023)

64% (2007)

75% (2006)

61% (1997)

62% (1988)

71% (2018)

68% (1973)

79% (1966)

79% (2002)

63% (2010)

70% (2004)

69% (2014)