Year	current US$
1980	216.7798559942644
1981	183.97256862747025
1982	152.94333960042613
1983	147.987287914198
1984	138.2611074037904
1985	157.04870014139343
1986	205.33607615084992
1987	228.84711595241345
1988	230.42320928423456
1989	230.4679474659812
1990	275.93486424808157
1991	276.3838243103851
1992	282.06394160241393
1993	277.2267981196149
1994	191.09819097258622
1995	245.25699641177272
1996	246.8375333739555
1997	230.12632365303025
1998	241.84148786030477
1999	285.85616855491804
2000	235.87614047512074
2001	258.3916726768388
2002	269.28548473231814
2003	332.58483845864157
2004	372.2071119451035
2005	415.20157788728716
2006	426.8002207015203
2007	482.0809812556147
2008	573.0174268486729
2009	564.8718712547341
2010	578.4053441734997
2011	672.9874815919827
2012	600.6834786104611
2013	641.729845106258
2014	699.6640466426661
2015	620.0002104560688
2016	641.2492801410217
2017	684.8257977422869
2018	735.808588469471
2019	711.910861057447
2020	687.2275509093791
2021	662.1401852393037