Year	current US$
1975	584167437.7701321
1976	616316373.6850007
1977	558537237.2120974
1978	597823646.5226399
1979	564367270.3096884
1980	580467323.306023
1981	635652125.9086587
1982	674923966.3858774
1983	732457687.8052065
1984	796303657.4087056
1985	859852742.0744486
1986	910531997.5794736
1987	808600145.2895125
1988	1296705829.6463783
1989	1055273042.856576
1990	1093473669.0835083
1991	1602633063.0806847
1992	1943598970.2352757
1993	2483219576.905913
1994	2741658596.668369
1995	3380436724.620532
1996	3421442059.508324
1997	3403728394.2572036
1998	3066048888.445154
1999	3421151872.4691033
2000	3533900964.9714584
2001	3842634360.3465853
2002	4096441959.918305
2003	4481379859.512441
2004	5123749224.6595125
2005	6005719072.938302
2006	6955909278.498751
2007	8313830891.456316
2008	9926201042.883766
2009	9951177021.33606
2010	10842976658.727335
2011	12296626377.725761
2012	13375305411.108356
2013	14402903331.802097
2014	15771426667.244581
2015	17053757291.13146
2016	18967809017.54076
2017	21037039214.26525
2018	23246027821.26799
2019	25525557061.424145
2020	24826000924.82445
2021	25558378554.629726
2022	27954426822.16684
2023	30819403229.763844