Year	current US$
1970	253480000.29474497
1971	264810001.90787032
1972	331100001.3798475
1973	299820000.60006976
1974	382510000.4095583
1975	460390002.51516706
1976	505970004.8454104
1977	403000001.95950264
1978	692669992.9349121
1979	985689987.0578206
1980	988720008.5073705
1981	1088950007.9397125
1982	982019985.5044485
1983	900480013.1414088
1984	710610003.5384302
1985	779400003.6157668
1986	1039349997.9469926
1987	1336580016.762019
1988	1319540014.1496215
1989	1287509990.3270595
1990	2957769981.1905627
1991	3266909965.390339
1992	4980219928.525391
1993	3741899983.9834914
1994	3576939957.842237
1995	6262180043.708532
1996	2809390008.432791
1997	2145180022.580549
1998	1888839994.315059
1999	1688820001.7232454
2000	1330900001.6506765
2001	1424030004.8068159
2002	1622549961.7233875
2003	1395249990.4837458
2004	1632019978.737459
2005	3540419992.083689
2006	2063380034.238101
2007	3910970047.459012
2008	4603130059.950054
2009	2403030009.4075527
2010	2332079979.8239017
2011	3016059985.855594
2012	2298100003.225729
2013	2841620000.168681
2014	4202540017.4986596
2015	4867650021.111595
2016	5358930018.898099
2017	5176380050.092936
2018	5928059981.012714
2019	4991310037.588701
2020	6363439974.848182
2021	4889960022.706538
2022	7054330036.651343