Year % 2001 100 2004 100 2005 100 2006 100 2007 100 2008 100 2009 100 2010 100 2011 100 2012 100 2013 100 2014 100 2015 100 2016 100 2017 100 2018 100 2019 99.92 2020 99.92 2021 99.92