Year	current US$
1998	198229263.34316644
1999	181702464.3647581
2000	191917897.29342937
2001	208619269.17292544
2002	196916569.74527514
2003	180321640.12998217
2004	204872028.4250342
2005	203137949.37726262
2006	277999279.6098997
2007	289692619.0472254
2008	236969195.18152827
2009	229664343.4728002
2010	345425692.22494364
2011	361464723.7549714
2012	296643438.8334108
2013	398179445.8712408
2014	436884528.6751798
2015	403186310.3934106
2016	546071597.1762335
2017	535780301.1498142
2018	520379772.71471167
2019	556972714.5294055
2020	444196343.9553224
2021	520270591.60539985
2022	664061484.264329