Year % (cumulative) 2006 0.727663934230804 2007 0.723842918872833 2008 0.736003279685974 2009 0.641901910305023 2010 0.644838392734528 2011 0.699289977550507 2012 0.703352212905884 2013 0.664096236228943 2014 19.0622863769531 2015 18.8321781158447 2016 19.206470489502 2017 19.6531066894531 2018 20.1250705718994 2019 20.9816398620605 2020 21.4662895202637 2021 22.1335792541504 2022 22.1627388000488