70% (1957)

65% (1995)

51% (1990)

44% (2004)

53% (2003)

61% (2005)

74% (2015)

76% (2001)

74% (1988)

72% (2000)

63% (2010)

60% (2008)

66% (2016)

80% (1993)

68% (1992)

76% (2000)

76% (1964)

83% (2018)

72% (2006)

75% (2018)