Year	current USD
1976	74059004.8404515
1977	70219123.7172855
1981	104567945.1607894
1993	77754357.771459
1994	71806248.64154555
2001	82145538.40501429
2002	100872444.79502611
2003	113479984.3903935
2004	162040671.4574015
2005	186300164.3531062
2006	219665997.2487991
2007	246993485.9891
2008	319035957.23830235
2009	301655230.4584292
2010	305046766.2183095
2011	327552252.6093056
2012	355159679.7239034
2013	392549709.7395488
2014	369393892.7761928
2015	392109174.65691626
2016	427200740.1461993
2017	427927004.5760292
2018	460770979.3962158
2019	530172811.55884045
2020	509607950.8512858
2021	528549870.43903184
2022	524059576.3719944