Year	constant 2015 US$
1988	11294942903.278835
1989	10974491121.414442
1990	11112974874.265348
1991	11327046787.761885
1992	10724257496.459652
1993	10139165342.989471
1994	8954523558.52884
1995	9867026809.460682
1996	10292596286.15922
1997	10561369914.153502
1998	10781414727.822374
1999	11061262084.304619
2000	11132700770.067442
2001	11093026103.544058
2002	11201105585.032322
2003	11585272774.214525
2004	11441309394.215933
2005	11757910491.390278
2006	12037657643.902403
2007	12595874788.191967
2008	12934606264.937164
2009	13704998117.315706
2010	12940432698.81843
2011	13613114244.456549
2012	13696297456.876122
2013	14262936390.668108
2014	14690865581.553822
2015	14890262233.93645
2016	15172739098.397045
2017	15562322100.06717
2018	15807021115.55748
2019	15540252920.646893
2020	15002422454.677324
2021	14720279531.539038
2022	14473928861.666235
2023	14189407714.470259