Year	current US$
1970	4012765.93704384
1971	4582518.95002807
1972	5427150.62111802
1973	7087961.82106325
1974	7735331.12582783
1975	10300000
1976	12276333.9466421
1977	16709323.0403801
1978	24795822.2651533
1979	35254723.9263804
1980	41577650.5404016
1981	49936332.3984702
1982	51592736.9056037
1983	49834442.5198286
1984	52956446.3955637
1985	51934169.0318512
1986	57694641.0515671
1987	83000059.562809
1988	123400415.618506
1989	131006234.272668
1990	158443617.307175
1991	224672853.429412
1992	221462767.218088
1993	249803523.620558
1994	226316796.223088
1995	263515355.485334
1996	257709478.644316
1997	273455229.143204
1998	275397685.399819
1999	320580434.848996
2000	362548440.626982
2001	385344209.656592
2002	366430881.580062
2003	561316699.534292
2004	703000768.896378
2005	846662435.569801
2006	773473105.414809
2007	734464070.241739
2008	850367834.859174
2009	950760273.75718
2010	1151564587.28803
2011	1423528438.23813
2012	1342804984.51149
2013	1351011149.49815
2014	1439349620.89549
2015	1244235618.55267
2016	1307488531.81301
2017	1395632505.15105
2018	1453295802.6
2019	1499723745.33791
2020	1391790503.1616
2021	1579185592.532