Year	current US$
1972	10699401.19760479
1973	15982308.460550722
1974	27918329.030743957
1975	20608191.697289202
1976	19487121.830562495
1977	18985945.166745212
1978	23193259.612732198
1979	23792783.92114826
1980	25859556.114246152
1981	26869221.97388002
1982	19626459.254480593
1983	18622270.870213468
1984	18336684.16235271
1985	15410347.825783316
1986	15316442.665447395
1987	16832612.13572519
1988	19299824.67489851
1989	21148239.320510805
1990	21102105.52692035
1991	23047214.579717644
1992	23201297.25156575
2006	104590002.95939751
2007	119267876.74717507
2008	130298327.93425143
2009	122132930.48060778
2010	140527024.03961256
2011	168060668.63820487
2012	167315316.5093016
2013	163258524.69920632
2014	158824839.11938652
2015	146912755.71148455
2016	152615271.6222103
2017	168902202.55403683
2018	152192673.10813114
2019	152311111.45096967
2020	154337426.9227196
2021	194763734.71364397