Year	constant 2015 US$
1990	12353094495.626984
1991	12946043028.475706
1992	13153179715.581285
1993	10022722943.450994
1994	10092882005.837034
1995	9547866377.835424
1996	8144330020.922127
1997	7313608358.583439
1998	6231194321.390843
1999	6704765089.460436
2000	7710479852.945939
2001	9190891984.445805
2002	8501575086.642167
2003	9258215269.1354
2004	10239586087.36345
2005	11345461384.70303
2006	12173680065.78635
2007	13877995274.70411
2008	14238823151.48233
2009	14381211383.223047
2010	14769504091.072344
2011	16527075077.91261
2012	18758230213.56369
2013	19077120127.35904
2014	20946677899.268852
2015	21449398169.60605
2016	21942734326.80938
2017	22403531747.62454
2018	19244633771.535027
2019	22227552006.16282
2020	25072678663.057964
2021	24470934375.44222
2022	26697789403.277927