Year	constant 2015 US$
1995	4998183597.767577
1996	6472688505.96992
1997	8362421956.411326
1998	8899625907.79414
1999	7605569957.097265
2000	8106875618.903905
2001	9705345292.862888
2002	11658835792.05117
2003	12777736271.243748
2004	15135265875.169136
2005	18110759764.27304
2006	20701032996.777725
2007	22905195743.34491
2008	25383607886.21678
2009	18110250497.85624
2010	21154713927.267174
2011	24162370376.044518
2012	25411492164.18397
2013	26888252712.092953
2014	26438672541.24725
2015	28911509381.843735
2016	30079990663.57967
2017	33431089061.059746
2018	35445300981.72615
2019	37573793839.63982
2020	35939627807.45076
2021	43103589443.821465
2022	48457131158.73708
2023	46062308607.532005