Year	current US$
1960	139999991.42857143
1961	120000000
1962	151428562.85714287
1963	151428562.85714287
1964	122857151.42857143
1965	108571428.57142857
1966	117142857.14285715
1967	97142857.14285715
1968	114285714.28571428
1969	103286384.97652581
1970	55815628.37594526
1993	827697458.4232056
1994	1079617531.4108355
1995	1603001242.5738533
1996	1535847163.8334222
1997	1560476055.08604
1998	1384886252.6091588
1999	1886392172.889824
2000	2256850529.5796576
2001	2454136529.5107036
2002	2753379504.2124076
2003	3100545073.3852725
2004	3784818547.170281
2005	4578016312.767257
2006	5530235561.079632
2007	6301646907.893196
2008	7016217770.358378
2009	5816477500.871033
2010	6691507416.3411045
2011	7633716514.968584
2012	8813214288.122986
2013	10303038305.295177
2014	11192212102.043344
2015	11939258368.877144
2016	13144698876.83559
2017	14216875345.515026
2018	15554628992.204689
2019	16921449044.123627
2020	15948088861.263483
2021	16812106051.49012
2022	16183953608.897268
2023	12832862452.07685