Year	current US$
2002	3053188188.523207
2003	3649327292.6825266
2004	5217822229.097394
2005	5981749016.562957
2006	7200961960.659383
2007	10738001166.581772
2008	9665324690.360756
2009	9941597920.962505
2010	14732824613.642921
2011	19953356280.023857
2012	23098194755.00315
2013	27522751711.220547
2014	28825130922.504192
2015	21929223456.216057
2016	21801042076.834484
2017	25367287617.488457
2018	27743535405.159958
2019	26360248478.45712
2020	10246204999.220743
2021	9748718026.770063
2022	9026079086.812439