Year	constant 2015 US$
1988	811254063.1709186
1989	749634018.3119645
1990	828775901.7062377
1991	867168756.9296849
1992	862412131.3684175
1993	638119101.1123354
1994	415655567.21801233
1995	929004837.0822731
1996	1038041249.107667
1997	1117440244.844695
1998	1081216710.6443715
1999	1340269658.3571358
2000	1590486485.4395657
2001	1396211822.678917
2002	1260798800.3213363
2003	1438327519.8732224
2004	1527135117.962136
2005	1518611140.6685705
2006	2084581193.7457185
2007	1839967746.7819912
2008	2259388303.2131023
2009	2042346877.2300482
2010	3047049470.749486
2011	2419869040.1003795
2012	2001525212.8248317
2013	2201514145.6970296
2014	2336713574.6592164
2015	2075046904.570211
2016	2166667741.5867357
2017	2388492103.733245
2018	2262256515.8366175
2019	2564854900.004887
2020	1970430619.5629008
2021	1403117141.40223
2022	1264546760.5441787
2023	1041554092.5428846