Year	current US$
1971	160.65162755042078
1972	171.89427367087444
1973	188.25466184687133
1974	229.73334977014633
1975	233.3616618224988
1976	206.63024235812574
1977	234.24278545890147
1978	157.54866604348263
1979	216.1644499522751
1980	253.89951158853813
1981	271.91534935425204
1982	293.40629534090544
1983	310.31854263894263
1984	351.9671585486919
1985	352.3137695798398
1986	372.8424785789327
1987	382.9331394116113
1988	396.355013819619
1989	391.2533999095775
1990	443.87235329831844
1991	487.7152527534278
1992	523.2337932562166
1993	551.8107218460865
1994	613.9945516762785
1995	671.0789448672848
1996	708.9965087878209
1997	768.0250641616569
1998	784.8168333803806
1999	771.1939783302306
2000	799.5532156940071
2001	772.9611703103417
2002	806.9406808343512
2003	918.265721153152
2004	989.1800241135816
2005	1152.9671414814861
2006	1315.921645758505
2007	1494.4687382999757
2008	1834.1940997407426
2009	1908.7049691232023
2010	2632.4071840290785
2011	3005.0279778340846
2012	3073.687180481114
2013	3306.896376708315
2014	3513.4826904906845
2015	3614.457178200337
2016	3718.4799191522866
2017	3957.8897913281803
2018	3936.0460007531287
2019	3671.8493963810024
2020	3490.725902109042
2021	3611.5912358045584