61% (1988)

63% (1999)

55% (2006)

68% (1974)

76% (2011)

61% (2005)

51% (1993)

65% (1980)

73% (1953)

66% (2014)

60% (2016)

78% (2019)

69% (2012)

69% (2009)

54% (2004)

75% (1996)

56% (2004)

72% (1994)

65% (2017)

54% (2004)