Year	current US$
2000	8070253050.195134
2001	8032111320.415459
2002	8380338765.488382
2003	10162180986.921246
2004	11387597042.451912
2005	12041745184.42578
2006	12896309502.758389
2007	15000880199.728836
2008	17695016075.40627
2009	14472197808.622772
2010	16434474707.219563
2011	19437886571.041855
2012	19005750102.24125
2013	19261086622.394627
2014	19833287173.468163
2015	18003891796.945812
2016	18162297276.34544
2017	20238808148.770794
2018	21881344877.443317
2019	21609517695.041016
2020	20355252637.526077
2021	25132885735.48347
2022	28687242629.226604
2023	27262479480.278614