Year	constant 2015 US$
2000	9779256692.578543
2001	10465190129.870895
2002	11267236458.857428
2003	12177690150.482796
2004	13064864051.24417
2005	14658409251.278818
2006	16127248805.525517
2007	17338727833.102215
2008	16640604762.083902
2009	14427266739.919243
2010	14448214024.182987
2011	15900911526.270113
2012	16604169267.832703
2013	17281923570.69841
2014	18004285955.823032
2015	18469479757.3469
2016	19355262004.325115
2017	20444532744.633472
2018	21450309530.988483
2019	22249847321.169636
2020	22150565465.349174
2021	24163901493.703106