81% (2000)

67% (2011)

70% (2001)

70% (1992)

59% (1994)

72% (2004)

58% (2012)

55% (2013)

74% (1995)

68% (2001)

77% (1998)

77% (1988)

64% (2010)

58% (2009)

56% (2017)

70% (2005)

68% (1999)

55% (2008)

63% (2014)

63% (1987)