Year	constant 2015 US$
2001	13841626288.412237
2002	14387164525.37729
2003	14942748800.22627
2004	15205660367.141367
2005	15862443492.256868
2006	16641940522.421644
2007	17235869416.86754
2008	17491105385.63169
2009	18557974378.91714
2010	19614380933.207302
2011	19985643514.063267
2012	20553154884.986702
2013	20986796287.24448
2014	21770430392.836906
2015	22503227656.415955
2016	23094838487.83727
2017	23663913341.666836
2018	25030089632.0482
2019	27105124445.31261
2020	28085423225.921215
2021	30067979358.133327
2022	32194996567.468204
2023	31795819662.507202