Year	constant 2015 US$
1975	12607543666.564531
1976	13650435287.540134
1977	14014805036.414028
1978	13556423220.923632
1979	16499409654.13586
1980	14470267222.506397
1981	12686373660.311287
1982	14761646236.429592
1983	11534287899.849436
1984	16528605948.11614
1985	16560721871.49445
1986	15403964703.995754
1987	15569215727.92414
1988	15232874421.271315
1989	15904973108.697363
1990	17208295671.977066
1991	18162430559.25262
1992	17198368932.023773
1993	18102870119.532852
1994	18852630948.946445
1995	16090077612.532345
1996	19480351269.522465
1997	21045272626.865475
1998	21197093355.56293
1999	23328422816.12337
2000	24927795800.363113
2001	25916966240.415
2002	26746140989.454956
2003	20986880038.90491
2004	26366589167.71131
2005	27497069670.627758
2006	28296464199.807827
2007	24013367872.90074
2008	25978862383.6532
2009	30467500620.181454
2010	30243857008.292507
2011	31275654037.555607
2012	31563529496.20117
2013	31294923591.582596
2014	31642943415.827534
2015	32108332341.8732
2016	29818758967.939636
2017	32616931783.00968
2018	31713014521.38021
2019	28372374564.156567
2020	25612156931.260887
2021	31499881575.32417
2022	36452156960.25928
2023	37634606866.460625