Year	current US$
1977	267.68730099401455
1978	282.0139498518476
1979	320.6191188525385
1980	369.9796698425439
1981	390.7138012059075
1982	374.16682189092427
1983	347.35998783133545
1984	339.10448984442957
1985	349.53407725760917
1986	333.1271836591678
1987	353.6247537186022
1988	371.1481175925089
1989	374.62943575148375
1990	383.2162683816537
1991	402.83215320734166
1992	362.3289515685476
1993	329.3925192049911
1994	291.07015869725984
1995	296.14461953413814
1996	293.32401960883465
1997	301.4692896946191
1998	296.71425730773336
1999	297.7872670091975
2000	308.11634733199674
2001	312.9431485218168
2002	322.9606949585944
2003	346.9558845050087
2004	399.2339939493444
2005	454.5383290295997
2006	504.118821238951
2007	576.1016443792831
2008	668.0194630018046
2009	730.0633258225638
2010	781.4483527786695
2011	827.8790941696795
2012	891.7149735242403
2013	957.1097718028665
2014	998.2378896644611
2015	978.8908627865032
2016	952.0680156349803
2017	968.9072186392352
2018	1046.9745240944567
2019	1104.387466785814
2020	1084.1718185589605
2021	1141.784103023653
2022	1228.327386808611
2023	1272.999899816782