Year	constant 2015 US$
1991	10684232140.60876
1992	12414026274.620247
1993	13657354959.266388
1994	14774292707.090538
1995	15371006697.904013
1996	17302852530.56648
1997	17337975759.984505
1998	17645637033.57955
1999	17284085621.2696
2000	17906890879.077644
2001	18781926886.318657
2002	18622966176.98601
2003	18809540855.545235
2004	23161468679.79962
2005	23939643516.324585
2006	24472499983.23946
2007	26051955961.754757
2008	28089274741.21456
2009	30624358600.413715
2010	33251367144.608093
2011	33607020593.080135
2012	34100963939.441254
2013	35265280976.02097
2014	36326284857.19924
2015	36851118629.51907
2016	37253351871.12798
2017	37571369288.38189
2018	37161937330.28307
2019	35404680605.8419
2020	28934607910.71565
2021	27525201849.79043
2022	27358396946.694088
2023	27248155497.53421