Year	current US$
1980	2481.5627329598697
1981	2278.6330257255486
1982	2107.0791712121795
1983	2223.8254234167457
1984	1837.3533188102099
1985	1470.9788435301386
1986	1603.7820645007225
1987	1973.5790369375193
1988	2065.5629885369667
1989	1968.1661692174487
1990	2037.9104721412198
1991	2117.005716577041
1992	2346.276391185389
1993	2153.341912518418
1994	2352.6618642182802
1995	2478.253739830494
1996	2417.577961468006
1997	2453.866576664132
1998	2231.1144746181694
1999	2175.449454945227
2000	2156.090245248582
2001	1916.2558622278968
2002	1773.4315544612673
2003	2571.9823973866087
2004	3407.8506484841523
2005	3692.7526028130087
2006	4027.9617061587087
2007	4394.5173413563825
2008	4222.326189125767
2009	4322.629265979914
2010	5445.420063027408
2011	5873.059381032041
2012	6017.178365414831
2013	5463.031366209955
2014	5544.104068446753
2015	4965.672765065511
2016	4614.892074938963
2017	5453.570623415011
2018	5687.381042800111
2019	5126.176142816734
2020	4252.041720143527
2021	4901.875889478376
2022	4895.680660891388
2023	4742.783826777454