Year	current US$
1970	328640012.4579664
1971	382390011.05725753
1972	421519991.7256829
1973	345589999.26038086
1974	317279993.3236095
1975	317729996.5806305
1976	314709999.0844722
1977	337719993.3528897
1978	273190007.20977765
1979	260690001.26794016
1980	241740006.44683835
1981	458130014.19045097
1982	136699997.1866609
1983	132049998.34299096
1984	72899999.08208854
1985	104830001.98006633
1986	88919998.52657326
1987	111409999.38547607
1988	122529998.51107596
1989	244619996.16958207
1990	152950000.04209578
1991	166669997.33634287
1992	29049999.604001578
1993	179109999.35865396
1994	576560010.4629989
1995	1234619987.7262118
1996	1070929997.2653397
1997	937719998.2404715
1998	1073419973.3734131
1999	1405719992.1608021
2000	942239995.7180021
2001	943020013.3919721
2002	830550034.5230106
2003	765759985.923767
2004	937420030.9514998
2005	1223030017.9719937
2006	1377340027.451516
2007	1388659994.1253662
2008	1575419984.3406675
2009	1467679967.88025
2010	1603330011.367798
2011	1626210023.880005
2012	1530800021.8868258
2013	1520140010.7145302
2014	2418719967.6036816
2015	2469770014.0476255
2016	4645420049.369338
2017	2116060025.215147
2018	2465850015.640259
2019	2316749988.555908
2020	4156470045.089727
2021	2680580013.2751517