Year	constant 2015 US$
1976	262404302.56099305
1977	276959217.55745846
1978	298167804.378485
1979	313554426.6032789
1980	291514129.05169785
1981	316881266.0196176
1982	333515452.5873064
1983	336936123.53708375
1984	377984178.4476564
1985	435708005.9707412
1986	523790293.39669394
1987	600263675.9387318
1988	648154488.838954
1989	680121905.9659512
1990	732596726.9611973
1991	764201576.8699207
1992	814870634.0113546
1993	846727169.9777261
1994	880682714.812674
1995	932392636.655291
1996	992710534.2133774
1997	1051762556.7163342
1998	1116197877.6754494
1999	1138970505.058197
2000	1224629895.6255975
2001	1285395212.2577522
2002	1253976040.7827806
2003	1267971417.3142366
2004	1275916136.89498
2005	1230693391.8081691
2006	1292013827.834092
2007	1325945358.2373462
2008	1364973894.7512758
2009	1398370640.1757805
2010	1425245359.9030938
2011	1435927277.0131836
2012	1465552920.422324
2013	1534543907.7476265
2014	1562055729.3059957
2015	1561983871.8419018
2016	1567043492.1366518
2017	1590564221.5779922
2018	1594492342.3308713
2019	1616563497.154766
2020	1329970989.5774477
2021	1439732338.23369
2022	1570273597.9132926
2023	1603877004.2895453