Year	current US$
1960	33369998.931884803
1961	51680000.3051758
1962	31239999.7711182
1963	36500000
1964	45790000.9155273
1965	68199996.9482422
1966	69230003.3569336
1967	74059997.55859381
1968	60000000
1969	66800003.0517578
1970	69239997.8637695
1971	71860000.6103516
1972	66650001.525878906
1973	73809997.55859381
1974	58939998.626709
1975	35849998.4741211
1976	28180000.3051758
1977	31620000.8392334
1978	69040000.9155273
1979	52419998.1689453
1980	45159999.8474121
1981	41669998.1689453
1982	40049999.237060495
1983	31620000.8392334
1984	33450000.7629395
1985	35759998.3215332
1986	40569999.6948242
1987	54119998.9318848
1988	70150001.5258789
1989	107019996.64306599
1990	104779998.77929701
1991	109080001.831055
1992	142979995.727539
1993	155179992.67578098
1994	191240005.493164
1995	246470001.220703
1996	248470001.220703
1997	243229995.727539
1998	212279998.779297
1999	250820007.32421902
2000	233610000.61035198
2001	204630004.882813
2002	234360000.61035198
2003	253669998.168945
2004	230979995.727539
2005	241289993.28613302
2006	307239990.234375
2007	308730010.986328
2008	418100006.10351604
2009	342609985.35156304
2010	389209991.455078
2011	371950012.207031
2012	410700012.207031
2013	423329986.57226604
2014	474420013.42773396
2015	471089996.33789104
2016	399459991.455078
2017	480359985.35156304
2018	588739990.234375
2019	621570007.324219
2020	529450012.207031
2021	575679992.675781
2022	547739990.234375