Year	constant 2015 US$
1977	339435411.0664382
1978	371993892.80634665
1979	372970667.4554284
1980	369925713.6666332
1981	399635834.17870885
1982	413580060.2488967
1983	436817732.8095564
1984	451879483.6559519
1985	482910802.53906566
1986	525571480.73171043
1987	561027296.1684061
1988	588667938.9749541
1989	657659937.0236896
1990	775111875.2452785
1991	790474834.1646819
1992	814721668.2012857
1993	834485359.1886702
1994	885771134.4346162
1995	891438964.7052983
1996	921743230.2440002
1997	952909404.5414274
1998	982311737.6316824
1999	1023348789.3924452
2000	1046747708.9674293
2001	1055797506.033845
2002	1042443413.0352175
2003	1089156166.8587842
2004	1133915246.8349433
2005	1176436288.8465118
2006	1204821446.4516566
2007	1240145676.2765431
2008	1271727446.2122598
2009	1257692040.8590531
2010	1292534272.105885
2011	1334177801.7174559
2012	1347178503.7284276
2013	1315957226.886148
2014	1348504463.3791702
2015	1337462962.9629629
2016	1364384492.0195904
2017	1414106229.6352873
2018	1469124808.7054007
2019	1466364433.6013486
2020	1045461458.1347238
2021	1136812731.064886
2022	1369800284.9994025
2023	1396403443.7968807