Year	current US$
1971	125.62049784604257
1972	132.67795964277659
1973	149.62846476522998
1974	177.3683785458118
1975	190.40393112122288
1976	194.15072563638645
1977	211.70897839958414
1978	235.77449208770543
1979	256.0698972169209
1980	309.27061784116324
1981	389.67407547748934
1982	375.96136565732513
1983	343.34978503300584
1984	316.76848234823905
1985	323.3553396394934
1986	329.99491752876486
1987	346.93857024366486
1988	356.2127618661099
1989	345.7633919978106
1990	362.3281842104916
1991	336.76790744574606
1992	344.55023733072477
1993	331.98282133474754
1994	364.1986446545472
1995	406.7989169430889
1996	442.0872686315305
1997	455.2184493564579
1998	454.1294228658541
1999	474.50261611817547
2000	473.6822917117605
2001	473.98397014116733
2002	490.68135397743225
2003	542.4526831283789
2004	608.0507146447737
2005	683.3933819546925
2006	791.1383626549273
2007	950.5398586164725
2008	1016.4041640829021
2009	1080.0176000471563
2010	1260.7624607561368
2011	1374.4494927991348
2012	1438.1735839628088
2013	1508.1422315733869
2014	1625.7263903400133
2015	1627.981343990258
2016	1678.4607430484523
2017	1769.14472011601
2018	1824.638164468306
2019	1888.9021964090348
2020	1806.21098152995
2021	1987.7452255696269