Year	current US$
1970	42150000.12889507
1971	62740000.78625975
1972	84659999.52144918
1973	106329999.32765965
1974	182149999.90537775
1975	240899999.76754194
1976	170170002.5778265
1977	197779998.2465804
1978	209669998.97360784
1979	364240003.0698626
1980	344309999.6149541
1981	512609998.7924103
1982	401789995.0463326
1983	402659998.76707786
1984	480919991.2175536
1985	359369994.04802966
1986	482559999.24615026
1987	606350006.3009558
1988	795130004.5624381
1989	644599999.1744751
1990	708150003.1128523
1991	1430070009.216666
1992	1186629998.8627439
1993	1061179999.6942283
1994	1370039987.9515169
1995	1362720005.5513535
1996	1561989996.418357
1997	1546770007.424056
1998	1811130013.404414
1999	1239130010.7389696
2000	1394829985.2311604
2001	1590139990.7656026
2002	1474070003.9155777
2003	1741759992.718697
2004	2145649985.1737168
2005	2522990025.3415112
2006	2780530004.687607
2007	3618820031.6224236
2008	3913049991.548065
2009	4051350033.0448146
2010	3713139983.8328385
2011	6112959900.308406
2012	6607680075.593294
2013	5274829956.725241
2014	5774510066.546505
2015	5077920017.28341
2016	6646259910.71202
2017	5321209917.604925
2018	4632669980.049135
2019	3900400009.3489876
2020	4841830023.46754
2021	6382320089.453836
2022	3231049990.091472