Year	current US$
1970	29720000.119879834
1971	44080000.18075108
1972	35260000.19162895
1973	62490000.15668571
1974	88689999.51332803
1975	200530001.01074573
1976	140739999.90895385
1977	163479999.076575
1978	201079998.9588558
1979	249759999.6440112
1980	319390000.68977475
1981	338769998.6863882
1982	372369997.6224451
1983	414120002.4504217
1984	448030000.04962087
1985	488019999.66800207
1986	393529995.49545324
1987	427689997.68607295
1988	503599998.699501
1989	508359998.7886844
1990	619129999.3451685
1991	942799993.2244419
1992	1191849985.3461976
1993	953069995.4330922
1994	843730001.123622
1995	734940009.9292396
1996	247649999.99850988
1997	195029997.39348894
1998	180129999.6227027
1999	241250002.86102313
2000	224569998.78212813
2001	255629999.9244511
2002	249369999.92467463
2003	240649999.83832228
2004	196159999.13588172
2005	387199999.57084644
2006	261359999.73118314
2007	192090000.48786396
2008	257879999.70465907
2009	245889999.22573563
2010	207339997.4703789
2011	269390001.0958314
2012	309044234.61830443
2013	294355765.4786856
2014	222140214.64297542
2015	223472672.82102254
2016	230260123.04425228
2017	222209429.17559308
2018	147915571.38226926
2019	188572877.55794823
2020	215585832.0109547
2021	302824189.8044944
2022	289203923.3818649