Year	current US$
1980	1643.0577353721017
1981	1650.0988373429152
1982	1504.31933433708
1983	1405.3761639549332
1984	1446.2843664370828
1985	1385.3039516273311
1986	1539.3687276143528
1987	1362.1059136591687
1988	1261.0008111574957
1989	1331.3722122864901
1990	1454.3166576347014
1991	1505.773306410633
1992	1663.357488736546
1993	1774.139003675098
1994	1944.2671752988797
1995	2151.1801753985
1996	2343.19987031023
1997	2236.1670819717315
1998	1719.0351467329936
1999	1989.7235945582945
2000	1801.375627609131
2001	1721.569127577628
2002	1963.7711972726033
2003	2398.248549476119
2004	2834.7068001294574
2005	3131.2194617350096
2006	3012.06414456084
2007	3369.73268519497
2008	3509.3719616390645
2009	2904.7882568420305
2010	3044.230754044869
2011	3510.3877303695363
2012	3660.619808669274
2013	3981.817990371831
2014	4383.741082810226
2015	4148.359043769177
2016	4411.870137690444
2017	4633.937753649794
2018	4908.81635650449
2019	4711.736149642524
2020	3929.704128245218
2021	3749.90030646452