Year	current US$
1970	239639819.462493
1971	289082515.868436
1972	385782693.242586
1973	504188117.434256
1974	549972421.400992
1975	540729613.733904
1976	592970576.77319
1977	569681050.65666
1978	698967391.304348
1979	808053691.275168
1980	860702567.071996
1981	950395470.818416
1982	960080844.865259
1983	1069905465.74527
1984	799210826.506275
1985	812250639.386189
1986	958178073.510775
1987	1450915506.03528
1988	1855384219.00161
1989	1929239509.97218
1990	2877486404.11164
1991	2352297996.84898
1992	2532090068.05615
1993	2778041037.55324
1994	3145304353.13511
1995	3534239505.84484
1996	4219633689.46857
1997	3851129042.42577
1998	3709608482.00852
1999	3651777155.01583
2000	3362658630.83475
2001	3549618868.24041
2002	4258153827.197
2003	5673891535.36094
2004	6667520000
2005	7103810462.57835
2006	6565493418.0663
2007	8077384581.4654
2008	6926754972.93876
2009	7496048972.45299
2010	9704627118.43839
2011	11294612011.7984
2012	12445869421.9965
2013	13515224807.5252
2014	14239162818.3503
2015	12687979427.8143
2016	13469088320.7741
2017	14655918052.6856
2018	15057048832.1004
2019	15341204578.7696
2020	15336475857.4852
2021	18099871339.652