Year	current US$
1980	287.386425581212
1981	276.26135306923794
1982	253.1385105341697
1983	252.20573823444946
1984	239.54601131377586
1985	215.92464666458008
1986	217.77821962357777
1987	207.53534971734317
1988	229.3820380284894
1989	252.23232848908404
1990	286.9165596075824
1991	326.1716352540745
1992	258.89561036764474
1993	293.7822176798664
1994	169.7491986671154
1995	201.1014041955129
1996	321.9596270542011
1997	368.67731165962033
1998	237.37433352345792
1999	235.510232049482
2000	225.9524567394537
2001	217.24047329639404
2002	431.6966609756051
2003	386.31724201357474
2004	407.5889900132442
2005	417.102263364075
2006	443.5236756651252
2007	478.0280764814687
2008	557.5190094084016
2009	630.1091540837032
2010	688.1391911853677
2011	769.0525991958816
2012	563.0615396777267
2013	501.19717297875
2014	534.1269771490893
2015	544.2768727418361
2016	454.44326606524766
2017	500.16554720332255
2018	537.9322040504379
2019	587.1154646594637
2020	621.4177724827747
2021	632.5331926482309
2022	643.4331956586575
2023	672.8697022225949