Year	current US$
1971	96.59552330662214
1972	116.80649392014213
1973	138.0920426676595
1974	149.23384704258777
1975	174.33460967287448
1976	175.5015855832798
1977	175.0821225608464
1978	215.19774723516775
1979	277.02860149755895
1980	317.95843703434247
1981	286.30248963455165
1982	258.26357987718234
1983	218.0490500393839
1984	199.6361082771774
1985	200.55628029052605
1986	246.55815247347732
1987	280.87614924899765
1988	283.02134930115426
1989	245.54009363680595
1990	312.6392925481789
1991	308.02416805734543
1992	238.58045905781256
1993	320.4162697002601
1994	198.80230060143896
1995	261.8988362217186
1996	276.602611457736
1997	262.72143600101833
1998	279.8799567238669
1999	434.25742223068147
2000	407.32009208240237
2001	422.044005513137
2002	478.63385738956987
2003	597.6837676521359
2004	674.3484371900173
2005	698.7448127069696
2006	725.5337290875941
2007	820.4914420225524
2008	955.8068696588076
2009	915.4088118659279
2010	866.930513953977
2011	954.0628106289319
2012	974.4254972228867
2013	1079.2872642120806
2014	1117.7821306006945
2015	933.9750394492966
2016	941.6727486138071
2017	973.6613921174663
2018	1060.9516409656383
2019	1038.1853790985501
2020	1093.8858011958675
2021	1210.8868870626022