Year	current US$
2000	8641031532.931988
2001	9017933393.116953
2002	10217510694.505262
2003	12771685790.325298
2004	14820162371.116024
2005	16067554151.33762
2006	17347816265.06024
2007	21603875009.359673
2008	26564471508.3029
2009	23167415588.28063
2010	21745079770.304863
2011	23961480791.250782
2012	22496462183.273003
2013	23216699218.15334
2014	23807362181.67659
2015	20171643534.53262
2016	20704535672.817577
2017	22046776650.053333
2018	24053049363.754047
2019	23870571912.315712
2020	23419295037.187603
2021	26892352833.74637
2022	27856420014.564415
2023	32088278098.14598