Year	constant 2015 US$
2000	13287664630.857025
2001	12961123400.768152
2002	14748486616.19775
2003	14899223742.233881
2004	15590809286.957726
2005	16326390988.570814
2006	16646072325.49876
2007	16721324837.692673
2008	16834874121.856417
2009	16893698995.164957
2010	17337993128.159042
2011	22606906857.190605
2012	27310059923.95004
2013	27128788536.62618
2014	26025274144.31036
2015	25805319148.93617
2016	25093953385.962585
2017	26019858439.18331
2018	26868525221.66354
2019	26970856259.492683
2020	26283541385.097595
2021	34030225313.690666