Year	current US$
1970	74232838.0304765
1971	87855466.559125
1972	101081380.623402
1973	109356902.318993
1974	206738662.721283
1975	332317729.458175
1976	388909490.195674
1977	410075763.922131
1978	428987376.185254
1979	524163842.855001
1980	440464291.856427
1981	378292022.630325
1982	387032750.201761
1983	329431733.81038
1984	439270580.525321
1985	361931618.057733
1986	745546812.986668
1987	701346711.687636
1988	542193440.898138
1989	711536368.484585
1990	1007239421.80521
1991	914370286.432504
1992	946642110.33346
1993	744005534.436424
1994	679269521.255978
1995	840715123.885951
1996	959819410.17418
1997	909492083.100945
1998	801262374.807721
1999	795137705.7026
2000	828730407.351962
2001	842037189.894698
2002	907389620.286012
2003	1092923651.60632
2004	1296583011.28562
2005	1534273869.03049
2006	1650795000.58366
2007	1988869496.971
2008	2451304842.76938
2009	1964213373.29239
2010	2385417311.65421
2011	3030188482.89561
2012	2894405984.50953
2013	3006439338.04612
2014	3128671293.15131
2015	2548634404.34352
2016	2533499870.5704
2017	2758337799.09768
2018	3130465551.31534
2019	3190108828.35301
2020	3127060855.24628
2021	4042373653.42938