Year	current US$
1970	425548451.955787
1971	759709053.375958
1972	615591003.967279
1973	896277751.112494
1974	1308238022.09951
1975	903517860.447078
1976	511850028.226107
1977	845088048.335997
1978	923463585.851333
1979	1372523302.78427
1980	1678304628.0744
1981	1457990929.25448
1982	1188657439.39571
1983	1471082613.52017
1984	1799923245.46989
1985	1087742527.47869
1986	1271066647.39747
1987	1271314295.8065
1988	1402156316.54858
1989	772414087.964
1990	1351500270.50147
1991	3863000429.48045
1992	6960447981.62728
1993	8414771863.06307
1994	10403473787.1
1995	8795160338.5379
1996	9332669524.5
1997	9105303471.49784
1998	11514742892.914
1999	12257032036.44
2000	12726174569.4
2001	12839722430.52
2002	3988842928.40618
2003	4579703000.00678
2004	4829932414.46608
2005	6147752543.41906
2006	8276227139.29315
2007	10807776572.6183
2008	14986157936.6764
2009	15524002166.8099
2010	18495499593.0454
2011	25044026118.456
2012	27749973043.2723
2013	28254626630.7062
2014	26250654225.5219
2015	30652512478.7175
2016	27576671454.3937
2017	31276869360.7932
2018	24944169422.8991
2019	20778236310.9186
2020	18923282005.2854
2021	24056828336.1412