Year	current US$
1970	285.9907850589866
1971	304.8032190640251
1972	331.91985215074584
1973	390.62966391905087
1974	451.59535231085897
1975	468.0799618668451
1976	543.3622176497413
1977	691.2997851344093
1978	817.6476703148642
1979	952.1911987040039
1980	1116.084960046504
1981	1182.5958767428126
1982	1228.6944669386394
1983	1167.9514964748007
1984	1112.3883708246344
1985	979.1805295958093
1986	968.4626629195142
1987	958.9766050812194
1988	1037.1813531518862
1989	986.0417506781276
1990	1171.8335414791325
1991	1219.5420343460967
1992	1443.7795017425951
1993	1638.9723011843078
1994	2003.2185425369853
1995	2205.0614510283667
1996	2233.9538544574934
1997	2412.609299005718
1998	2202.3729134953383
1999	1833.4829699958582
2000	2057.273244426495
2001	2029.438908888657
2002	1986.5401936490387
2003	1865.2085723479772
2004	2257.008831273884
2005	2791.184694679512
2006	3032.7928542575196
2007	3847.329844029783
2008	4371.342612491254
2009	4276.887699639416
2010	5117.455379538736
2011	5695.13693780884
2012	6324.501921220521
2013	6536.184760482617
2014	6572.181159749163
2015	5244.145101028979
2016	5050.789018646849
2017	5421.758926053104
2018	5601.735363945414
2019	5361.5165271944115
2020	4578.598875582276
2021	5094.625553831173