Year % (cumulative) 2006 99.4660568237305 2007 99.126823425293 2008 99.1567001342773 2009 99.0899505615234 2010 99.1222381591797 2011 99.0640487670898 2012 99.2143325805664 2013 99.0308532714844 2014 99.1899032592773 2015 99.2599182128906 2016 99.1692581176758 2017 99.360969543457 2018 99.3873291015625 2019 99.3269424438477 2020 99.2824478149414 2021 99.2185897827148 2022 99.2401504516602