Year	constant 2015 US$
1968	174203468.80466962
1969	198748771.64907274
1970	230112214.17154124
1971	267952889.38964528
1972	290452750.3352593
1973	313975332.2281631
1974	328634332.53579324
1975	399542985.1969345
1976	493292405.7861198
1977	550905686.0693506
1978	605791710.4931421
1979	711131968.5480883
1980	7204728199.003447
1981	7626771045.188091
1982	7720179558.710655
1983	7788701862.47374
1984	7698361511.708854
1985	8594605972.642496
1986	8502220179.898839
1987	11593564710.50704
1988	9003353446.386087
1989	9084489308.667461
1990	4822129288.150518
1991	1835784108.593786
1992	1874988411.7837057
1993	4510881211.676556
1994	4692925541.262335
1995	5460988976.086699
1996	5700987492.685564
1997	5825077634.8373
1998	5906213497.118674
1999	6239279620.383961
2000	5961344036.9348345
2001	6515332569.606334
2002	5946254113.927625
2003	4233628150.6249514
2004	3294874259.353616
2005	3259687521.6134305
2006	3601423667.8765564
2007	3826339987.96848
2008	4082704715.384356
2009	5552019272.448091
2010	5904042615.327027
2011	6041790861.629243
2012	6168668461.514748
2013	5584991552.989402
2014	4346292265.082955
2015	3627684381.389973
2016	3762212708.8414745
2017	4054718068.1164684
2018	4564045328.6546545
2019	4868548874.239371
2020	4566454479.600221
2021	6106891730.305072
2022	8242924483.357506
2023	9138127172.571266