76% (1999)

71% (2000)

77% (1997)

65% (2007)

72% (2013)

69% (2010)

70% (1996)

72% (2003)

76% (2002)

68% (2017)

70% (2012)

64% (2015)

74% (1991)

57% (1995)

61% (2004)

70% (2015)

61% (2005)

70% (2008)

70% (2008)

64% (2015)