Year	constant 2015 US$
1990	14146877397.300772
1991	12597215195.400381
1992	12138551442.51913
1993	13825348328.18788
1994	14381511635.845694
1995	15689665057.33085
1996	16121477488.746084
1997	16581245206.953506
1998	17063239796.89882
1999	18192364437.378506
2000	18169292116.81796
2001	18688185776.96679
2002	19135166359.109756
2003	19805678284.30116
2004	20307971412.580456
2005	20727564778.531235
2006	20995037270.099987
2007	22363606997.01835
2008	23005299324.87577
2009	23482288902.171474
2010	23711041612.88319
2011	23899138442.743736
2012	23375714641.462486
2013	22455549001.72577
2014	22820181537.126553
2015	23283088067.30155
2016	24318780627.261707
2017	24781612820.073036
2018	25654371193.019127
2019	27055495137.661312
2020	25300915890.4785
2021	27898876937.802326
2022	28906109382.60506
2023	29278289934.200764