Year	constant 2015 US$
1999	41730775309.69064
2000	44203964148.04248
2001	46279780384.46642
2002	49313865277.33821
2003	51857720217.953186
2004	54152435491.71085
2005	57089890799.238365
2006	60551099765.332924
2007	63640451228.178345
2008	67627122316.43428
2009	72061462624.25511
2010	76248788584.6561
2011	80352231964.43633
2012	83914392723.82321
2013	88487980475.79489
2014	93699277104.80017
2015	97703744071.25578
2016	100190187361.81845
2017	102329310273.97337
2018	105660258886.18788
2019	107553435785.6266
2020	103530620448.43741
2021	106396459384.02751
2022	110961486015.40979
2023	115281000578.33926