Year constant 2015 US$ 2006 24618094827.60966 2007 26307059303.159542 2008 27045948148.8931 2009 28777969134.688076 2010 30877916129.784065 2011 32370202962.35051 2012 33809530594.68882 2013 34858079987.45829 2014 36961876439.839584 2015 39359573123.44288 2016 41669247494.62588 2017 43802478686.04733 2018 46452198171.61733 2019 49566282744.35658 2020 48657684453.9521 2021 53329506353.95971 2022 56887425575.01324 2023 60417873669.07618