Year % 1996 100 1999 100 2000 100 2001 100 2002 100 2003 100 2006 99.95 2007 99.97 2008 99.97 2009 99.97 2010 99.97 2011 99.97 2012 99.97 2013 99.97 2015 99.97 2016 99.97 2017 99.97 2018 99.97 2019 100 2020 100 2021 100