Year % (cumulative) 2006 13.4695405960083 2007 13.1459684371948 2008 14.0452575683594 2009 15.5891647338867 2010 16.4717082977295 2012 16.5004234313965 2013 18.1174850463867 2014 19.3112316131592 2015 21.1014671325684 2016 21.5148601531982 2017 22.3957271575928 2018 23.7458457946777 2019 23.7146053314209 2020 24.4691505432129 2021 24.4859180450439 2022 24.6147575378418