Year	current US$
1980	608.6082878425995
1981	546.3530752596055
1982	496.4490061540629
1983	503.4313968074393
1984	474.1295165767289
1985	486.4136838486064
1986	672.0547309940839
1987	795.3397872022541
1988	814.1702873008331
1989	766.8286142983956
1990	931.877335314078
1991	897.8651101357294
1992	952.5701226616812
1993	918.715274517787
1994	628.826766802637
1995	755.5933174029104
1996	733.6067465217687
1997	660.1561817403576
1998	654.5730281209632
1999	668.1227792834703
2000	604.3552161867527
2001	639.9791486436966
2002	702.6580013163419
2003	881.3401163085191
2004	1005.611055602453
2005	1021.1916879173319
2006	1071.1944969660983
2007	1190.1535869543377
2008	1338.7701410450602
2009	1299.118270798418
2010	1269.694416659735
2011	1395.257240959388
2012	1348.8917870654589
2013	1452.273054508524
2014	1466.3858347740731
2015	1200.9197968440515
2016	1234.021631510001
2017	1290.3155349119074
2018	1412.1160792455107
2019	1395.6725216189288
2020	1392.5240514343698
2021	1446.8592291306375