Year % (cumulative) 2004 98.341438293457 2005 98.3630676269531 2006 98.2348251342773 2007 98.6268768310547 2008 98.2881088256836 2009 98.3686828613281 2010 98.3992767333984 2011 98.3876724243164 2012 98.45361328125 2013 98.7590866088867 2014 98.7181701660156 2015 98.6351699829102 2016 98.7112503051758 2017 98.3298645019531 2018 98.6999664306641 2019 98.0000991821289 2020 98.7735214233398 2021 98.2888870239258 2022 98.6139907836914