Year % (cumulative) 2005 31.206750869751 2006 30.7072525024414 2007 30.0461368560791 2008 32.2131042480469 2009 33.1542625427246 2010 34.1293601989746 2011 35.7192993164062 2012 37.9617538452148 2013 38.6037940979004 2014 40.1247596740723 2015 42.6272354125977 2016 44.2393913269043 2017 46.4442596435547 2018 49.0921440124512 2019 45.0954208374023 2020 44.5090217590332 2021 43.9720001220703 2022 46.6220397949219