Year	constant 2021 US$
1960	23500000
1961	23319999.6948242
1962	44810001.373291
1963	138149993.89648402
1964	167759994.506836
1965	334779998.779297
1966	421350006.10351604
1967	336890014.64843804
1968	469079986.57226604
1969	495220001.220703
1970	402649993.89648396
1971	369130004.88281304
1972	326079986.57226604
1973	207619995.117188
1974	160130004.882813
1975	497000000
1976	242220001.220703
1977	322489990.234375
1978	357019989.013672
1979	480429992.675781
1980	482130004.88281304
1981	384760009.765625
1982	389399993.89648396
1983	300040008.544922
1984	600820007.324219
1985	534690002.441406
1986	799669982.910156
1987	785669982.910156
1988	1004260009.76563
1989	1245680053.71094
1990	877859985.351563
1991	1329119995.11719
1992	888020019.53125
1993	923450012.207031
1994	739500000
1995	816419982.910156
1996	854469970.703125
1997	703349975.585938
1998	989710021.972656
1999	854030029.296875
2000	881750000
2001	1040209960.9375
2002	1061709960.9375
2003	1330760009.76563
2004	1703209960.9375
2005	1381729980.46875
2006	1437959960.9375
2007	978880004.882813
2008	1056069946.28906
2009	1428030029.29688
2010	1821300048.82813
2011	1858819946.28906
2012	1857920043.94531
2013	1354650024.41406
2014	1145119995.11719
2015	2010489990.23438
2016	1503300048.82813
2017	1409150024.41406
2018	1147050048.82813
2019	991859985.351563
2020	2339939941.40625
2021	1238469970.70313
2022	1077420043.94531