Year	constant 2015 US$
1960	198921600.98712546
1961	213840723.22914064
1962	371320327.3308138
1963	442600567.82098925
1964	485700249.16754436
1965	489015615.47136873
1966	441955038.7713465
1967	486969882.75112724
1968	628149693.089061
1969	810251311.9339494
1970	1049644089.8651924
1971	1086472514.1074586
1972	1125348414.20859
1973	1164224141.222981
1974	1205145600.0587661
1975	1207191507.6048222
1976	1244022198.642469
1977	1379061845.5808065
1978	1512056632.2866018
1979	1579575758.1525064
1980	1923320271.8310459
1981	2101332168.393615
1982	2293383408.6742206
1983	2689275449.666355
1984	2952622138.074966
1985	2760780179.3598566
1986	2664859200.97931
1987	2675323307.001182
1988	3024126867.9638686
1989	3256081329.1686087
1990	3484007022.194779
1991	3275264917.145731
1992	3298536485.4584994
1993	3560940131.143006
1994	3466988587.3508034
1995	4001466348.428365
1996	4167742962.59212
1997	4664465992.225359
1998	5082831456.911145
1999	5194759824.722556
2000	5131866989.252275
2001	4840487263.442821
2002	4902323559.903283
2003	4779488214.58874
2004	4675262039.456634
2005	5138827687.559115
2006	5347104302.609702
2007	4436381481.660982
2008	4635067311.190683
2009	5374983500.914392
2010	5526561994.941524
2011	5850284095.676654
2012	5357458829.757205
2013	4988925465.922333
2014	5321745349.438728
2015	5080489797.900448
2016	5328055398.314151
2017	5440671203.230648
2018	6561867041.573723
2019	6316316798.44699
2020	5722448670.709474
2021	5665223974.996916
2022	5623798835.075606
2023	5679505878.189597