Year % (cumulative) 1992 19.7561302185059 2004 28.4467296600342 2005 27.1775093078613 2006 28.333740234375 2007 30.6401691436768 2008 31.2212200164795 2009 30.7104301452637 2010 32.2187614440918 2011 33.6383514404297 2012 34.4877510070801 2013 34.6091804504395 2014 35.3686981201172 2015 35.0810394287109 2016 35.6465187072754 2017 35.5626525878906 2018 36.2759017944336 2019 35.9275360107422 2020 36.8444595336914 2021 40.224536895752 2022 41.2710800170898