Year	current US$
1973	152.38451792687044
1974	196.84192373591287
1975	239.13894586226056
1976	235.4496975536885
1977	240.86208927577002
1978	272.0037506958361
1979	288.6144300045619
1980	355.29329422256114
1981	574.6356329196041
1982	525.4299483438812
1983	421.31402407710544
1984	375.9439292708386
1985	374.35681998314595
1986	361.5752437913505
1987	366.17752686309353
1988	373.8931527736861
1989	346.2305100463725
1990	363.6758899702972
1991	365.5700290569311
1992	352.60537036290845
1993	323.56993948859474
1994	306.0128991152435
1995	346.27654287573364
1996	378.911404608388
1997	383.54945200645534
1998	383.41377391241866
1999	392.57216177547156
2000	411.28298010066396
2001	405.3427588642128
2002	424.371805094726
2003	456.4368990070098
2004	524.3711625644088
2005	591.2430719375687
2006	702.0468608071528
2007	796.7692030917243
2008	928.4581052829534
2009	930.4793758462889
2010	1028.4158036837728
2011	999.7839324838797
2012	1053.1271048668054
2013	1129.441374505937
2014	1215.6808306216737
2015	1184.1307588044228
2016	1197.7959353504057
2017	1218.0226690099682
2018	1233.4925540397749
2019	1253.9429777423577
2020	1219.5862674056198
2021	1275.9460644386395