Year	current US$
1970	15530000.118538747
1971	19040000.00283123
1972	25250000.350177296
1973	38419999.69631434
1974	53280000.12785192
1975	62489998.839795634
1976	59640000.56125225
1977	85819998.14696606
1978	116050000.16652054
1979	157899999.07091263
1980	168409995.91723078
1981	121299999.74928795
1982	136719998.94268814
1983	138810000.93184415
1984	147560001.19447717
1985	158990000.2982468
1986	231160001.82740378
1987	242069998.49155545
1988	329139996.0666894
1989	338960000.7403641
1990	370490001.2724103
1991	388149995.4313038
1992	378419997.06812197
1993	400160001.43997365
1994	404340002.52559775
1995	439960001.13524497
1996	525490002.5837123
1997	443189998.8278747
1998	503529997.4586814
1999	525929998.8877027
2000	468140001.12004596
2001	502979996.7799334
2002	493110001.3181568
2003	547300001.9099563
2004	649099997.840822
2005	734320004.9102305
2006	877579988.0083649
2007	1007439992.6308541
2008	1040800002.0980843
2009	1084270003.2535937
2010	1099760000.5306296
2011	1079729995.5748017
2012	947380008.6732951
2013	812449993.1614846
2014	819810004.50626
2015	570269997.3043053
2016	562909998.8229574
2017	571939998.6043571
2018	590160005.5210291
2019	647200000.5301089
2020	610560004.3516605
2021	776810004.9085919
2022	533309995.3606725