Year	constant 2015 US$
1990	12053739751.455694
1991	15026674996.757002
1992	17840514900.061398
1993	19463572378.38816
1994	21296420121.1437
1995	22841207292.065502
1996	25129840980.114452
1997	25193949858.347717
1998	25830409760.207726
1999	25787224814.19633
2000	26307766994.42142
2001	26692964812.078804
2002	26396524611.3365
2003	23696657451.76466
2004	29322757853.66018
2005	31063940583.64474
2006	32052051291.750004
2007	35807240403.02939
2008	38488045012.79392
2009	41576115403.17135
2010	44579038976.70522
2011	45312023667.13745
2012	46527377419.79896
2013	48305754446.41635
2014	49138099831.17987
2015	49420827836.81592
2016	49843218808.979294
2017	50975258286.25282
2018	49107907536.40898
2019	45487612269.40507
2020	35467300879.923325
2021	31945579197.08173
2022	33141580204.845497
2023	32751211286.110672