Year	current US$
1970	269049993.9862642
1971	296959998.27608424
1972	351209994.4949153
1973	588240005.2286693
1974	688899994.9414287
1975	749409998.05741
1976	721849997.6322055
1977	797820005.0294403
1978	1432199989.8422506
1979	1828449996.2441623
1980	1839990008.8571
1981	1876189984.2321873
1982	2232670005.5450215
1983	2280270010.843872
1984	2281180025.7749863
1985	2395170018.5891256
1986	3575380027.7728586
1987	4881850031.448529
1988	5896719925.027341
1989	6169600001.45808
1990	6291040051.169696
1991	8061260051.731028
1992	7668780003.292489
1993	7216620096.685365
1994	8509890009.393914
1995	8977250035.468487
1996	7098120021.317153
1997	5374519965.030254
1998	7434920007.875187
1999	9157199961.913752
2000	8047079949.686303
2001	6321940023.833886
2002	5646119986.567647
2003	5249700055.610389
2004	4685920022.707434
2005	9112910105.075684
2006	5942439957.4697
2007	4579139960.560946
2008	4596089972.6599455
2009	4376010008.072478
2010	5530839988.188818
2011	4712419971.494009
2012	4491529978.910461
2013	6773140133.306392
2014	4029710066.363214
2015	3922950089.085844
2016	4475770015.92145
2017	5181230077.605699
2018	3761360077.0831137
2019	5196330034.159125
2020	7463770012.719558
2021	8791310037.92584
2022	10979509968.966253