Year	current US$
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	72580645.16129032
1971	465725806.4516129
1972	326553672.3163842
1973	267211201.8669778
1974	593989071.0382514
1975	663237924.8658319
1976	793246517.2622653
1977	884420055.9500751
1978	1113863523.1612153
1979	1641949476.9073744
1980	1699768544.0317426
1981	2400694894.8392477
1982	1874871868.9092615
1983	698161508.0288574
1984	531372443.77650154
1985	455731741.0731939
1986	581771596.867282
1987	839385957.9109799
1988	1115554229.0666568
1989	1093082820.0612385
1990	1128810654.955519
1991	1505690494.3987176
1992	1828704064.9137864
1993	2213478650.0797243
1994	2541685757.319163
1995	2610384942.510631
1996	2864497663.2099543
1997	3843272879.323326
1998	4158996495.102091
1999	3654653400.121701
2000	3267960225.435701
2001	2854075469.117059
2002	1680849925.5796936
2003	1508201159.196266
2004	1966382005.170047
2005	2873111481.048753
2006	3600240481.6145716
2007	4421075969.200322
2008	6396116746.908741
2009	6131115461.226641
2010	7999977730.99975
2011	9624746953.123835
2012	12014281973.799362
2013	13397672052.897408
2014	13183628086.952501
2015	11412766125.620518
2016	9739318265.00368
2017	10556661777.62899
2018	9642333854.213234
2019	9016657570.098318
2020	8268887228.670703
2021	10761520060.304892
2022	13455022718.774694
2023	13416939260.406189