Year	current US$
1976	357403437.0895866
1977	401979141.88350236
1978	438890038.169642
1979	516795210.2278528
1980	579103448.9579521
1981	510935885.4912784
1982	508528358.11286217
1983	508533939.2800396
1984	506437054.8159961
1985	576008404.8659792
1986	885094544.4937674
1987	1214376182.6656594
1988	1381558262.2802594
1989	1400873862.5318012
1990	1723622086.287136
1991	1779993084.7259076
1992	1912137908.8424444
1993	1900665938.5398648
1994	2018277243.443856
1995	2369967141.402058
1996	2811723401.745714
1997	2573649427.6700225
1998	2738797089.942128
1999	2771402053.0927577
2000	2849019400.6314316
2001	3136674473.479551
2002	2982651358.3872905
2003	3257695157.693276
2004	3508043724.685226
2005	3829946691.8368864
2006	4107913610.754008
2007	4553284994.8916855
2008	5102127246.498222
2009	4352373919.736669
2010	5125648055.508634
2011	6040733715.484072
2012	6276844450.9698715
2013	6462776011.406402
2014	6867142254.440711
2015	6183497020.541009
2016	6193059608.012327
2017	6603761656.136547
2018	6792605733.41506
2019	6448303392.076968
2020	4489066530.293479
2021	5076281376.826545
2022	7156205104.817431
2023	7666473922.357732