68% (1990)

75% (2018)

72% (2018)

61% (2016)

75% (2005)

69% (1985)

51% (2010)

59% (2010)

53% (2015)

73% (2006)

68% (1972)

67% (2008)

72% (1961)

71% (1981)

73% (1980)

73% (2013)

56% (2012)

54% (2019)

52% (2020)

63% (1971)