Year % 1996 77.27 1999 77.42 2000 77.42 2001 77.42 2002 77.42 2003 77.42 2006 77.45 2007 77.42 2008 77.42 2010 76.62 2011 76.62 2012 76.62 2013 76.62 2015 76.43 2016 76.43 2019 76.43