Year	current US$
1996	3796525503.6131845
1997	4399230337.968137
1998	4930189229.683832
1999	5134330322.710577
2000	4537628384.896388
2001	4093011325.5868373
2002	3665299323.0904756
2003	4328972370.196447
2004	5317262908.610937
2005	5925214476.4919195
2006	5827071355.68683
2007	6263577711.632675
2008	7323323551.889876
2009	8299405726.069075
2010	9508077000.717175
2011	11175431624.776365
2012	12759178234.846592
2013	14150619727.847181
2014	14857577287.325808
2015	15666018698.797747
2016	17032319937.816809
2017	17506623960.980988
2018	19140221314.91041
2019	20027337570.921417
2020	17762574412.56109
2021	21000435319.617603
2022	23810735951.719326
2023	21800691653.954147