80% (1977)

66% (2011)

60% (2007)

64% (2000)

73% (2006)

62% (2008)

79% (1994)

63% (2005)

70% (2001)

57% (1999)

73% (2004)

74% (2014)

70% (1996)

72% (2010)

80% (1990)

62% (1997)

67% (1999)

66% (1994)

59% (2013)

62% (2023)