Year	current US$
1975	4475836904.756769
1976	4712795277.163805
1977	5033282416.066169
1978	5521506703.418589
1979	6953885838.055568
1980	8529314521.115536
1981	8651970321.822899
1982	7813514141.937723
1983	6988870824.174143
1984	6981137147.470258
1985	7336273840.677217
1986	7965099252.030717
1987	8370955942.923206
1988	9494728742.1744
1989	10564869550.27473
1990	12454650710.26069
1991	12981894689.793573
1992	12510739331.303244
1993	11991041888.509903
1994	12005413033.634321
1995	13644401759.813387
1996	14764985842.438288
1997	15806677805.680878
1998	15616601142.241657
1999	16234335901.160555
2000	17671493811.51134
2001	18378223244.784687
2002	19479571463.801945
2003	21655655769.196358
2004	25298231937.203945
2005	29648541277.621174
2006	31812567368.54243
2007	37599793886.18321
2008	42384529055.056755
2009	35165842830.23103
2010	41206404231.51042
2011	40882060433.990685
2012	46466237233.19614
2013	48574604666.41756
2014	49299016539.51497
2015	41605497171.31889
2016	41425184388.70084
2017	40505841961.74228
2018	43295901869.30133
2019	42684830258.731926
2020	33983761432.835323
2021	41132580479.610985
2022	52084351887.88889
2023	51973018037.43457