Year	current US$
1970	90206.4313922574
1971	1275470.6112729
1972	6840247.15900434
1973	20736828.4725847
1974	121822557.900356
1975	182018888.575819
1976	417813775.55594
1977	538476085.355057
1978	674898884.035751
1979	2259727202.22621
1980	2461861114.69809
1981	1829981953.88869
1982	1453941102.93866
1983	2221122305.73696
1984	2663222162.97094
1985	2653691186.59655
1986	1620392487.94355
1987	2278884125.48764
1988	1880164544.1716
1989	2904650372.50631
1990	4203666311.50808
1991	2352500883.89619
1992	2526259170.07159
1993	2710019810.49949
1994	2515835160.6347
1995	3004827941.04537
1996	4131805155.97507
1997	3914167500.66266
1998	2199146607.34196
1999	3177935143.99768
2000	6100603539.77077
2001	4761920049.31482
2002	4814472564.14898
2003	6084216407.37692
2004	8799395105.57759
2005	11820431945.4007
2006	12686333901.3719
2007	12077854208.8431
2008	16489835988.2017
2009	9355957555.37836
2010	12649238360.8045
2011	16054263445.5603
2012	15526013723.9615
2013	14511877562.31
2014	15211598632.0033
2015	11123489566.2333
2016	8658655454.89596
2017	10842636580.2247
2018	15553634782.3854
2019	12962505936.2852
2020	7095095595.18622
2021	15363584359.3465