Year	current US$
1971	258.962799072266
1972	293.738067626953
1973	350.388061523438
1974	422.411163330078
1975	478.118011474609
1976	496.398071289063
1977	553.792358398438
1978	644.361511230469
1979	749.919677734375
1980	987.922058105469
1981	773.194458007813
1982	746.937072753906
1983	667.393127441406
1984	596.288208007813
1985	576.238586425781
1986	753.136169433594
1987	819.935241699219
1988	930.581176757813
1989	945.501342773438
1990	1074.86682128906
1991	1132.48327636719
1992	1163.44885253906
1993	1068.24340820313
1994	1193.56640625
1995	1270.52722167969
1996	1400.82055664063
1997	1247.48071289063
1998	1324.39794921875
1999	1299.92663574219
2000	1196.87573242188
2001	1201.36865234375
2002	1272.38513183594
2003	1551.28125
2004	1755.76904296875
2005	1830.3330078125
2006	1986.33312988281
2007	2256.12939453125
2008	2608.20361328125
2009	2562.43139648438
2010	2500.86499023438
2011	2673.94360351563
2012	2577.19409179688
2013	2788.39990234375
2014	3038.53051757813
2015	2790.25073242188
2016	2788.90551757813
2017	2926.20239257813
2018	3110.42016601563
2019	3116.80151367188
2020	2900.38012695313
2021	3361.27465820313