Year % (cumulative) 2006 26.750509262085 2007 27.0659866333008 2008 27.4049797058105 2009 28.4401702880859 2010 30.0014400482178 2011 29.8061504364014 2012 30.4177799224854 2013 30.5247802734375 2014 31.5528507232666 2015 32.0645713806152 2016 32.5408706665039 2017 35.124080657959 2018 35.78759765625 2019 35.7981986999512 2020 37.2799682617188 2021 39.2936553955078 2022 40.1140022277832