Year	constant 2015 US$
1994	8689052327.389267
1995	6659635157.382523
1996	6889377803.062045
1997	7550604189.563041
1998	7106520987.223578
1999	7857040837.374047
2000	10808447950.41173
2001	8996546953.040726
2002	9365700781.184837
2003	8979338511.387657
2004	10750394631.386171
2005	11665629189.20577
2006	13068224556.760538
2007	13671693012.55362
2008	12622524247.074968
2009	13724115490.087826
2010	16637236889.33257
2011	18180300568.92241
2012	20597481109.311077
2013	23089251908.42041
2014	23476071968.92869
2015	25492178587.723595
2016	26620257055.38424
2017	31830058299.572636
2018	36765750300.20271
2019	37729460645.52277
2020	39471125811.73944
2021	36959629081.501205