Year	current US$
1968	54710000.127553895
1969	58100000.0238419
1970	69109999.4592369
1971	80709999.8034537
1972	70310000.1793355
1973	87119999.7421354
1974	76030000.1390278
1975	110970000.663772
1976	105360000.776127
1977	97859999.0606308
1978	125099999.584258
1979	172390000.939369
1980	193979998.677969
1981	285970001.906157
1982	242950001.209974
1983	215150000.48279798
1984	229139999.434352
1985	253680000.737309
1986	293459999.114275
1987	299199999.45163697
1988	367719999.790192
1989	406230000.793934
1990	307519999.921322
1991	354940002.318472
1992	295160002.68608296
1993	239829998.61240402
1994	187969999.615103
1995	174240001.58160898
1996	228389997.05016598
1997	293469999.64118
1998	247430000.86769497
1999	209320000.50693798
2000	165819999.566302
2001	126490000.993013
2002	131769999.26380798
2003	154239999.759942
2004	186349999.83757702
2005	196400001.324713
2006	228829999.96841
2007	222389998.942614
2008	285480000.85353905
2009	287139998.57381
2010	270680000.87142
2011	215339999.802411
2012	218829242.022708
2013	210155233.036727
2014	234271715.164185
2015	229507334.102876
2016	217801012.925804
2017	204413976.66372398
2018	229641288.347542
2019	252222706.437111
2020	293030618.816614
2021	281781057.417393
2022	271269491.9109344