Year	constant 2015 US$
1988	7305182539.064328
1989	6854265226.080808
1990	7287352044.461991
1991	7110294930.559166
1992	6730704551.072004
1993	7356560365.532587
1994	6716931336.909716
1995	7758738855.366251
1996	8798342620.9078
1997	9060585018.2452
1998	9344864598.30527
1999	7376393854.256457
2000	11628467001.321032
2001	11739447147.558468
2002	11925707925.769478
2003	12145695287.167864
2004	11958263578.014584
2005	12133280930.088713
2006	12293400070.47453
2007	12697341968.92621
2008	12896724004.19774
2009	14050740003.05357
2010	13176811598.55418
2011	13667355366.903168
2012	13894684420.509724
2013	14640137262.443182
2014	14710913459.675484
2015	15491959967.050753
2016	16385730047.267397
2017	17163453193.854467
2018	17868949284.9647
2019	17577206148.098057
2020	17065384051.658354
2021	17392317714.063774
2022	17562260761.040268
2023	17637715417.29116