Year % (cumulative) 2006 17.0872898101807 2007 17.8267707824707 2008 19.4811401367188 2009 20.3079700469971 2010 21.6011600494385 2011 22.7225704193115 2012 23.4640102386475 2013 25.1599006652832 2014 25.474479675293 2015 26.1342296600342 2016 27.2982406616211 2017 28.3642501831055 2018 29.3541297912598 2019 30.793399810791 2020 31.7333106994629 2021 37.749828338623 2022 38.1531791687012