Year	current US$
1970	63394998.8006719
1971	71308392.8644776
1972	84493063.7399859
1973	78715656.0995269
1974	112786193.735082
1975	143158561.680164
1976	167080499.207812
1977	220477316.521602
1978	283941579.035956
1979	356716294.325947
1980	388957904.460952
1981	494632811.255237
1982	485809733.390268
1983	459951327.116796
1984	468346007.371725
1985	359482180.182251
1986	262993059.24314
1987	273374478.483194
1988	339758655.117661
1989	326813773.780384
1990	311416425.812411
1991	328336668.361664
1992	352331666.058225
1993	362820385.260286
1994	366753796.107825
1995	374398451.84123
1996	388561531.891146
1997	463761344.735632
1998	567297044.536946
1999	644594881.569282
2000	712439253.970462
2001	704442829.410773
2002	677006989.059999
2003	725303878.971611
2004	812221482.446821
2005	883825998.745762
2006	1055690149.92414
2007	1181746910.0247
2008	1362323804.799
2009	1492793029.73484
2010	1673015244.21855
2011	1992387327.72956
2012	2277836723.53738
2013	2479295105.44577
2014	2796618785.72687
2015	3033834723.00198
2016	3405185992.96426
2017	3754764058.20484
2018	4352759347.00605
2019	4629521720.58091
2020	4303890534.64032
2021	4921294484.09466