Year % (cumulative) 2006 26.385290145874 2007 26.8340129852295 2008 27.0722198486328 2009 28.2386798858643 2010 30.0507793426514 2011 29.9047908782959 2012 30.7215099334717 2013 30.9856796264648 2014 31.8422508239746 2015 32.8792114257812 2016 33.3036499023438 2017 36.1202697753906 2018 37.1657524108887 2019 37.4671592712402 2020 39.3438339233398 2021 41.345645904541 2022 42.1272735595703