Year	current US$
1995	3260379261.53827
1996	3278761774.02369
1997	3255789557.83522
1998	2913465857.16888
1999	3246658686.58046
2000	3344686876.33991
2001	3624996607.51258
2002	3852898203.0892
2003	4203405817.25083
2004	4790070551.48766
2005	5637808832.31448
2006	6501809280.85947
2007	7765876967.743
2008	9264451554.76889
2009	9180491062.40451
2010	9974550237.67341
2011	11320120247.032
2012	12313296563.9253
2013	13231818618.3354
2014	14371715201.8832
2015	15523898757.4343
2016	17198328017.0274
2017	18995802383.9613
2018	20928072142.6328
2019	22914939072.7098
2020	22263869156.3778
2021	22808826440.8048