Year	constant 2015 US$
1980	2276.6967247914085
1981	1758.8631775027245
1982	1946.7592150901771
1983	1755.5123498343808
1984	1461.42028363053
1985	1341.4354977254407
1986	1213.4078699168806
1987	1412.2742893854968
1988	1620.6161202796893
1989	1773.1108602652566
1990	1871.858718194526
1991	1995.0326891370908
1992	3169.4983136223887
1993	3203.402399141059
1994	3291.9382155770145
1995	3307.947951998683
1996	3244.4362853747557
1997	3232.3068088341906
1998	3348.7360256309616
1999	3464.0458741688108
2000	3615.753529646293
2001	3755.7272189065025
2002	3921.72769334389
2003	3959.061105870299
2004	3833.6156311774384
2005	3677.359158360868
2006	3493.614560175826
2007	3474.89423969233
2008	3434.042145787077
2009	3220.895659781175
2010	3233.3066975917936
2011	3237.2707710154295
2012	3311.566416541887
2013	3426.874129122721
2014	3470.5713960744333
2015	3517.6479698621592
2016	3478.1264508746253
2017	3392.407248343261
2018	3400.998518959068
2019	3483.1929796374347
2020	2999.307123967337
2021	3460.416001435725
2022	3689.771121348021
2023	3818.942397322919