Year	current US$
1970	55700000.172480926
1971	67439999.87281868
1972	76870001.56939033
1973	96500000.46566129
1974	188250000.01490113
1975	207299998.01702803
1976	274330005.3142009
1977	233260001.17324287
1978	295820002.22057104
1979	330310000.99703676
1980	360110001.1859089
1981	263519996.36180705
1982	398699996.98735726
1983	329299995.9476293
1984	308730002.9881303
1985	319269998.9620595
1986	381330001.9595772
1987	528270001.52692145
1988	497039998.4288957
1989	561219987.4091895
1990	776669982.1129444
1991	592039988.7021637
1992	1053009979.3579427
1993	333259999.72224206
1994	459609987.84750736
1995	402509994.95387095
1996	694160019.0587347
1997	661420015.2531263
1998	259520001.74298877
1999	325770003.65965086
2000	248670003.85746357
2001	410520004.4699007
2002	247299997.53460285
2003	322409997.8283049
2004	329790002.43544567
2005	2419669992.361223
2006	870090016.3985794
2007	2702540039.6958046
2008	2463620042.0204554
2009	678379987.9550936
2010	578459995.7317121
2011	721409996.5281793
2012	691110005.617141
2013	1031990000.8533155
2014	1473770005.8221822
2015	1378060019.1354759
2016	2706329987.6451488
2017	3293090019.2856784
2018	3172900018.8205385
2019	3232100006.2413516
2020	3691360001.9905725
2021	3538870032.5079265
2022	3290979962.0881677