Year	current US$
1975	593807095.838447
1976	683060991.6187013
1977	915700620.1077564
1978	1201750027.8489473
1979	1543061556.8862276
1980	2549584742.951907
1981	2378220641.562064
1982	2433756350.1849566
1983	2432714015.572859
1984	2537349850.448654
1985	2630131190.0191936
1986	3127802485.8757067
1987	3766831546.8940315
1988	4482024090.33877
1989	4855258816.568048
1990	5904629321.382842
1991	6347713383.838384
1992	7685142242.50326
1993	6618868433.451119
1994	7455197619.047619
1995	10018948253.557568
1996	10055335006.273525
1997	9680701254.27594
1998	9993916289.59276
1999	10220386192.01726
2000	9743114043.355326
2001	9922854280.510017
2002	11286693269.23077
2003	14326260475.65119
2004	17342031250
2005	18531634125.108818
2006	20661896876.17614
2007	25108995346.290718
2008	31398382891.460377
2009	27440939605.109367
2010	27923958585.204723
2011	28666765825.754196
2012	25495158826.092102
2013	23560305346.539967
2014	22979937607.276844
2015	19360136739.670544
2016	20636886895.618153
2017	23024691790.657715
2018	25237180922.700096
2019	25679504876.207684
2020	25571847420.779037
2021	28315810717.67971
2022	29157525711.31031
2023	32525516802.92339