Year	constant 2015 US$
2000	11488358663.7108
2001	11757223837.761368
2002	12140762726.431593
2003	12609940069.680128
2004	13326195025.845602
2005	14228989300.063854
2006	15159862849.498203
2007	16382167261.300095
2008	17135283213.75083
2009	16812771728.460007
2010	16965473630.139942
2011	17505782914.048733
2012	17897959014.454075
2013	18429597738.31989
2014	18720128196.37528
2015	19549522844.99896
2016	20219779368.526184
2017	21443862356.747147
2018	21914573722.157127
2019	22435685496.84256
2020	20571281649.447876
2021	22879562590.5298
2022	24122876436.28198
2023	25151071464.14744