Year	current US$
1970	76964522.629245
1971	88553833.8848377
1972	130152340.207718
1973	115659941.583204
1974	158664558.521072
1975	146804131.089821
1976	207023795.31848
1977	281667430.440795
1978	255303858.319097
1979	293796617.267484
1980	352794612.105147
1981	387396881.030999
1982	474757339.630991
1983	597226394.568855
1984	667460208.464544
1985	651394961.512944
1986	513995216.011892
1987	538235327.005926
1988	529561759.993953
1989	511295019.183978
1990	529026826.411585
1991	612496822.821208
1992	673022010.289034
1993	545985584.35639
1994	564791014.19003
1995	527440788.19528
1996	689684837.891189
1997	667300222.224601
1998	722801558.444735
1999	831416947.497202
2000	973825966.640239
2001	1083905603.03704
2002	1121479620.90846
2003	1592450829.21187
2004	1510432939.93254
2005	1952967526.23752
2006	2436327596.69735
2007	2733474970.00856
2008	2889611822.00085
2009	2761147861.12773
2010	3436229116.40365
2011	4042955153.25513
2012	4775234799.16153
2013	4297802719.65019
2014	3105447779.46315
2015	2804773121.72517
2016	3154091603.01814
2017	2973272247.82812
2018	2607425729.76551
2019	2515284794.09851
2020	2019039332.48664
2021	2110479474.34272