Year	current US$
1970	5053902.18926908
1971	2457801.02643561
1972	3020976.93278388
1973	6026717.07705072
1974	8627488.89439375
1975	8675208.5768752
1976	8527035.22350738
1977	11101007.2594628
1978	15755302.0714088
1979	26135685.5699662
1980	41737796.1295117
1981	44779852.3519312
1982	43743043.4523172
1983	46609443.9104436
1984	47140894.0330559
1985	33754762.7678152
1986	35027692.4461415
1987	37883082.6791986
1988	51394890.0564097
1989	52616790.852465
1990	81979560.6844073
1991	92709492.3226482
1992	114497828.794154
1993	131408821.631049
1994	168519766.739408
1995	209406166.624236
1996	206726128.174374
1997	251306029.623159
1998	238596783.590564
1999	241553094.612237
2000	244104200.792687
2001	212873076.151265
2002	208290306.633051
2003	308938008.067303
2004	376481477.637559
2005	367264543.346264
2006	394914485.841089
2007	407902415.479809
2008	452105236.865964
2009	537736902.168478
2010	786942842.660483
2011	1052322083.17296
2012	1162261066.57578
2013	1018050496.73217
2014	957729212.567139
2015	843894731.351912
2016	717654676.749257
2017	760090712.367739
2018	713371955.967893
2019	774102604.587831
2020	664703302.461968
2021	766670063.786925