Year % (cumulative) 2006 99.2269058227539 2007 99.998908996582 2008 100 2009 99.5024261474609 2010 100 2011 99.9637603759766 2012 99.7739562988281 2013 99.4922256469727 2014 99.8971939086914 2015 99.8218994140625 2016 99.5691375732422 2017 99.7165908813477 2018 99.8866577148438 2019 100 2020 99.6741180419922 2021 99.8419494628906 2022 99.5827331542969