Year	current US$
2002	2924222253.2964296
2003	3892834735.23235
2004	3370785319.8421
2005	5926079446.720574
2006	8036151470.698463
2007	10140400358.80829
2008	14887432594.309992
2009	13990137954.404015
2010	14281396196.014786
2011	20385821008.73213
2012	22848012194.248844
2013	28614294308.409065
2014	24440928316.502544
2015	14871125503.338537
2016	7323673931.011177
2017	9532425303.888348
2018	8322096952.820588
2019	6096413923.539281
2020	4255567408.603421
2021	5124772676.015166
2022	8101700426.4119005
2023	5389678749.681228