Year	current US$
1971	124.0444917254439
1972	141.87582677208366
1973	155.58668241525328
1974	179.90862519525106
1975	189.24494748303388
1976	193.03422840088487
1977	241.29035376358289
1978	277.3230422213436
1979	315.0782307771417
1980	356.7149898539672
1981	324.6623814927569
1982	284.915442450859
1983	265.3571115102587
1984	267.9898960769957
1985	258.41193227978425
1986	292.6094481769312
1987	310.90941123319385
1988	312.9721008433745
1989	300.71903427184793
1990	292.7951048153987
1991	266.46556983734456
1992	258.34997651306594
1993	167.82555246725346
1994	207.30820341180313
1995	252.78283846097716
1996	339.6610308836821
1997	366.4254604894243
1998	386.0560782836119
1999	344.8492246329158
2000	331.21475553880407
2001	329.66688542667924
2002	321.2039940565634
2003	345.8341738505283
2004	368.91697718322195
2005	425.62534723241714
2006	581.3851459903957
2007	695.135733196103
2008	763.9659210581472
2009	766.3805625309071
2010	809.3461370083767
2011	830.421081742447
2012	970.685967468284
2013	1023.4653820559297
2014	1102.0331311343966
2015	1126.0099261264147
2016	1311.565013887729
2017	1396.3168606382812
2018	1555.7155860299451
2019	1684.5660606932088
2020	1651.267340345279
2021	1796.8066926433319