Year	current US$
1971	257772059.954483
1972	297248821.128359
1973	349977831.100987
1974	466910606.549329
1975	525695992.677852
1976	544394788.886667
1977	617710048.926681
1978	701612145.227753
1979	757104141.321348
1980	941799790.499487
1981	765487358.914449
1982	624184760.759494
1983	588223238.903998
1984	559780004.664957
1985	616523671.01582
1986	878155536.196207
1987	1048958749.05302
1988	1184335982.0646
1989	1167851749.93758
1990	1429388809.09971
1991	1388961754.00476
1992	1477892136.08086
1993	1040228649.27851
1994	786402579.296733
1995	1062759432.56638
1996	1251429493.56956
1997	1295003319.32708
1998	1367814838.86909
1999	1398668331.74302
2000	1320893301.5983
2001	1315172596.93462
2002	1524008332.37423
2003	1842738742.47884
2004	2016607312.39983
2005	2015270947.45424
2006	2129954487.4526
2007	2299050969.93962
2008	2825206489.10148
2009	2832960181.48624
2010	2858218910.05538
2011	3239207257.08304
2012	2881738604.66423
2013	3462997011.31583
2014	3799715491.37288
2015	3655283022.1276
2016	5260457102.1625
2017	5584433212.58135
2018	6393803054.35513
2019	6515480812.71934
2020	6814681944.23456
2021	7389560187.73252