Year	constant 2015 US$
1990	7197556126.074643
1991	7514247883.061469
1992	6116597884.364186
1993	5651735923.449889
1994	4877448619.531979
1995	3433723774.374438
1996	3327278001.26836
1997	4049297247.392968
1998	4458277183.526257
1999	4279946942.038056
2000	4378384841.355102
2001	4278982520.410729
2002	4565630241.179707
2003	5506222765.286561
2004	6601646879.776907
2005	7889183829.111363
2006	10382195250.225153
2007	12084850263.893305
2008	14961035733.668188
2009	15709094923.89807
2010	18504210672.882027
2011	21059491428.131477
2012	18649433944.389706
2013	20322446437.036373
2014	19135320110.057243
2015	16176702358.848648
2016	13831001159.760103
2017	14597030148.357975
2018	14975609983.673557
2019	15897085439.79312
2020	14897186540.599554
2021	14010721550.138033
2022	11591171608.821465
2023	13115480602.951561