Year	constant 2015 US$
1977	13990757858.400585
1978	13935056747.851238
1979	14453167593.577278
1980	14278990219.494745
1981	15377102111.264126
1982	15519449781.202585
1983	15927041963.772015
1984	17204636064.08757
1985	16329329311.877804
1986	16349665091.790283
1987	15591950347.809393
1988	15466401436.566172
1989	15339084014.714327
1990	14767039871.685335
1991	14401002806.88295
1992	15047314632.40292
1993	16041981206.087954
1994	17144514374.378893
1995	17241770602.695286
1996	17514972018.34061
1997	17552106556.94833
1998	17069361739.221384
1999	17820003138.130013
2000	18283296431.24879
2001	18520248260.952934
2002	20136470998.448357
2003	20659002423.33373
2004	21321229449.60685
2005	21519278230.094658
2006	20884460328.806282
2007	21107265468.3659
2008	19310676964.382217
2009	18501680991.649082
2010	18856224829.582104
2011	18796986697.81551
2012	19039243361.983295
2013	19222261894.384487
2014	19638695235.27258
2015	20089611046.21768
2016	20582081277.5676
2017	21011777750.658134
2018	21518393974.790356
2019	21338912463.606407
2020	20805770672.431526
2021	21323881518.157566
2022	19836744713.122612