Year	current USD
1970	2939585.50125376
1973	3341271.55123016
1974	3581366.35143003
1975	4203664.56865451
1976	5393251.2159455
1977	6127288.0633346
2004	125111557.457054
2005	122727193.134874
2006	131346231.269517
2007	219580214.29619798
2008	240532594.620985
2009	251869514.820335
2010	298147102.825701
2011	325806949.72332996
2012	238583385.374322
2013	217194107.113298
2014	268238787.71998802
2015	199517108.764826
2016	185878310.062383
2017	191407113.244397
2018	198074728.574408
2019	226306243.729258
2020	279576954.92519295
2021	278250788.014927