Year % 2000 98.99 2001 98.99 2002 98.99 2003 98.95 2004 98.95 2005 98.95 2006 98.95 2008 98.96 2009 98.96 2010 98.96 2011 98.96 2012 99.01 2013 99.01 2014 99.01 2015 99.01 2016 99.01 2017 99 2018 99 2019 99 2020 99 2021 99