Year	constant 2015 US$
1975	3255611244.374193
1976	4122760063.3253913
1977	5163905028.380536
1978	5520512684.85475
1979	6112963358.773323
1980	6415395426.330715
1981	6138350366.339288
1982	6542490969.928571
1983	6879845392.952736
1984	7692102220.543612
1985	7870505310.126507
1986	7501206386.8696785
1987	8236225359.5808735
1988	9317606714.763414
1989	10461428369.843685
1990	10804991360.815859
1991	10925647884.22558
1992	12562594165.001408
1993	10586919349.466019
1994	11301941912.2929
1995	12508433153.653652
1996	12618211318.450598
1997	13043913280.012651
1998	13401273411.528713
1999	14122822040.841105
2000	15010688142.031746
2001	15462482076.50055
2002	16349194831.034517
2003	17033673638.749886
2004	18300209552.513344
2005	18969793672.47443
2006	20208750910.34575
2007	21717963625.215614
2008	24069731589.923447
2009	22133298984.78802
2010	23185738793.582954
2011	22212994489.231606
2012	21086496333.792168
2013	19029954312.960545
2014	18833796483.57558
2015	19360136739.670544
2016	21023471449.875923
2017	22686242767.284725
2018	23487272978.544964
2019	24911174171.69802
2020	24344190508.822693
2021	25564234161.103947
2022	27812684727.259647
2023	29269640857.16709