Year	constant 2015 US$
1991	13193516350.585772
1992	12845276851.06459
1993	13106172647.293098
1994	14740549456.293125
1995	14105175731.431177
1996	14752436612.281061
1997	16036576481.433416
1998	17863828949.370373
1999	19291686431.04544
2000	20447291310.53494
2001	20999446895.724632
2002	22612868176.814373
2003	22874047953.603683
2004	24689142867.371323
2005	25581788728.486664
2006	25770728432.960724
2007	26957382331.092876
2008	27276707866.07359
2009	24788619297.79027
2010	22442121844.038918
2011	22150089946.569057
2012	21487857660.673214
2013	23593470147.583973
2014	26466565831.04365
2015	27753877547.367386
2016	24814591928.973537
2017	29697321292.724625
2018	34527611359.222435
2019	38940971780.94207
2020	36176209356.23317
2021	38253844432.71013
2022	38806000017.899826
2023	35918434124.206825