Year	current US$
1970	391577364.829337
1971	422181562.09902996
1972	534081183.55381244
1973	761132544.6077071
1974	1042176882.5478998
1975	1099107600.2596838
1976	1581709519.2985678
1977	1989060283.1105785
1978	2272042966.4425054
1979	2710160740.2835913
1980	3493834466.8394265
1981	3943109531.7956114
1982	4145421079.9796276
1983	4247030467.408351
1984	4440874566.639973
1985	4152376484.4762235
1986	3470746843.808431
1987	3856922695.406995
1988	4209834173.796064
1989	4393093961.837181
1990	4809511004.960319
1991	5248911170.212766
1992	5402232446.808511
1993	5913001063.829787
1994	6330627925.531915
1995	6651180851.063829
1996	6938166755.319149
1997	7219407712.765958
1998	7031309042.553191
1999	7528469148.936171
2000	9062898936.170212
2001	8976196808.51064
2002	9593510638.297873
2003	11074813829.787233
2004	13150159574.468084
2005	15968723404.25532
2006	18504760638.29787
2007	21730000000
2008	25710904255.31915
2009	22938218085.106384
2010	25713271276.595745
2011	28776595744.68085
2012	30749308510.638298
2013	32539468085.106384
2014	33387712765.957447
2015	31125851063.82979
2016	32250132978.723404
2017	35423643617.02128
2018	37802005319.14893
2019	38653318085.106384
2020	34621807712.76596
2021	39288670212.76596
2022	44383297872.34042
2023	43205000000