Year % (cumulative) 2001 99.9569091796875 2002 99.9785461425781 2003 99.9750289916992 2004 99.9745178222656 2005 99.9705505371094 2006 99.9734420776367 2007 99.9650650024414 2008 99.7746353149414 2010 99.8637313842773 2012 99.8071899414062 2014 99.8163528442383 2015 99.9426040649414 2016 100 2017 99.6284866333008 2018 99.9060745239258 2019 99.6476287841797 2020 99.9253997802734 2021 99.6800384521484