Year	current US$
1970	1223787.38660716
1971	1725462.79757568
1972	1372344.2902866
1973	1596970.90845458
1974	2311117.20014705
1975	1992394.8254611
1976	1935594.52886762
1977	3566747.67676304
1978	6523723.23207764
1979	11590621.4073677
1980	28467368.6028543
1981	32558413.8958798
1982	27713277.1625742
1983	36212670.3797889
1984	30047936.3708695
1985	24160879.6832894
1986	30163508.0234885
1987	35242667.0838336
1988	35334924.7981115
1989	35473494.0500566
1990	43374650.1914231
1991	51441247.8340676
1992	72087877.5488361
1993	69123158.0374859
1994	73531144.581722
1995	80367516.7019103
1996	70311121.7803104
1997	76551873.5636448
1998	90263657.1404515
1999	89682471.2971753
2000	87091832.4461159
2001	72926247.747626
2002	65277072.9840488
2003	91608642.8711576
2004	112654090.221435
2005	110979824.936028
2006	101602725.390235
2007	105138386.96026
2008	128466899.504843
2009	175114897.913205
2010	330058049.490288
2011	438306736.70868
2012	406686738.306906
2013	354305181.351446
2014	310919065.431839
2015	270819330.311402
2016	267597923.231685
2017	308327727.703537
2018	357817820.689071
2019	353951597.881212
2020	334968261.886298
2021	389448825.1734