Year	constant 2015 US$
1960	7086327675.1234
1961	8142517037.629783
1962	7626845512.963628
1963	8356584383.51743
1964	9691830558.754675
1965	9806601072.989357
1966	10675249402.605322
1967	10134996827.895067
1968	10147375773.960442
1969	11065451466.794579
1970	10986491475.106157
1971	11593325095.439459
1972	11944002953.262842
1973	12731480765.107283
1974	13534166996.40347
1975	14251969026.10852
1976	15528857312.751858
1977	16000671999.92926
1978	14417493219.211237
1979	16064777256.339233
1980	13471122792.51339
1981	15590575200.992085
1982	16808751914.868221
1983	18374600171.09472
1984	17895534958.364742
1985	18959063267.467026
1986	19949467373.740276
1987	19083206412.294064
1988	20876915697.16677
1989	20848002015.99979
1990	19673593718.569084
1991	20301294705.126877
1992	22123298723.863297
1993	21189749348.44744
1994	21214772503.70816
1995	22662048140.83704
1996	23543429100.691673
1997	24558414257.009026
1998	22701218663.029613
1999	23864574330.044807
2000	23935134322.61744
2001	24032839575.49057
2002	23307433336.059647
2003	21873951381.689327
2004	23556780678.233612
2005	23691799611.389515
2006	24239567974.78232
2007	25449963636.845932
2008	27088582411.72817
2009	28343807542.757103
2010	27311138177.77493
2011	27031373996.697475
2012	26897416116.061462
2013	28026552839.310226
2014	29450750584.131516
2015	29378068486.519104
2016	27722826555.49194
2017	28347609647.620037
2018	28391289643.022144
2019	29508754788.55213
2020	27801079178.833775
2021	29241546395.626698
2022	28945512742.577606
2023	28247163342.40386