Year	current US$
1970	88560582.67302392
1971	103098416.15112676
1972	122806467.23833214
1973	163095019.5476349
1974	190667516.9925317
1975	242181078.169267
1976	267835514.04561132
1977	298309815.7913897
1978	429450147.5091232
1979	494579500.51872677
1980	525567342.2815908
1981	502909417.47503614
1982	513179987.9326693
1983	515073920.6780675
1984	494036812.62536263
1985	520037686.32039475
1986	766047294.0107853
1987	1034867609.26829
1988	1141916216.7703137
1989	1100855784.9534667
1990	1397231560.4128544
1991	1458812601.4650013
1992	1603318475.513754
1993	1644510925.361579
1994	1914857877.3583527
1995	2387048793.668164
1996	2461247481.81649
1997	2259136037.5053487
1998	2437348816.709465
1999	2575899291.351425
2000	2434743786.130504
2001	2241032462.9728937
2002	2372888098.154313
2003	2627332545.700408
2004	2858151534.0620317
2005	3126141905.9298396
2006	3506738881.981237
2007	4120576557.4833007
2008	4569703348.752181
2009	3869164134.8279915
2010	4285908797.1495028
2011	4532105463.48033
2012	3807892637.604993
2013	5110561611.558478
2014	5374223244.858108
2015	5162508403.636397
2016	5985930500.896089
2017	6748709241.06218
2018	6917596481.378652
2019	6269829689.819124
2020	6866331075.942492
2021	7098789073.870214