Year	constant 2015 US$
2001	12970394060.95372
2002	13430677952.19865
2003	13855007579.377514
2004	13989132515.717957
2005	14645658235.093567
2006	15436882374.855354
2007	15925487400.243364
2008	16128074273.001049
2009	17042630942.50755
2010	18104792106.483303
2011	18208381364.97496
2012	18761050010.0218
2013	19257884783.91169
2014	19844041735.210705
2015	20356554578.807064
2016	21202543461.23618
2017	21369487072.525333
2018	22687949665.481968
2019	24534630011.937225
2020	25416910208.238758
2021	27441864501.846714
2022	29316455275.05987
2023	29523118013.611732