Year	current US$
1970	95461.5350305301
1971	169986.935298026
1972	232931.717593625
1973	390509.394928432
1974	379206.181007817
1975	324256.969225681
1976	249493.367428994
1977	374418.842537247
1978	315796.336539793
1979	499660.572431911
1980	579189.878888736
1981	394002.978855706
1982	537106.265419972
1983	504911.214782954
1984	342804.89669467
1985	344902.49753773
1986	425056.664783082
1987	495997.30575258
1988	468815.303001487
1989	363523.956247839
1990	343079.716846237
1991	312100.300342068
1992	375840.089317193
1993	277502.7962377
1994	354449.671976537
1995	453494.778118251
1996	464778.934747795
1997	379309.560024653
1998	554378.839397428
1999	442745.682433385
2000	446281.30959422
2001	473156.466143584
2002	503676.730871096
2003	597630.483897883
2004	501481.811000663
2005	537540.932734903
2006	630142.715899385
2007	836111.906228536
2008	1105782.92187951
2009	1007671.1090393
2010	1038398.39364073
2011	1170654.22488674
2012	1105943.241178
2013	1069195.15908853
2014	1348498.08667504
2015	1119881.39440646
2016	1171374.68941392
2017	1571612.8971882
2018	1225461.75389959
2019	1153826.05765959
2020	1199791.07025077
2021	1241758.09912924