Year	constant 2015 US$
1975	1086801787.2056136
1976	1208785170.7139537
1977	1552076761.7341213
1978	2161241187.851281
1979	2229759981.524883
1980	2559484160.567305
1981	3533791748.76539
1982	3533791748.76539
1983	3933110260.281612
1984	4334287317.580165
1985	4871739001.79841
1986	4735330433.191399
1987	4195502554.8980303
1988	3037543762.9542565
1989	2536349159.5303597
1990	2353732064.9944735
1991	2266644002.199188
1992	1909980119.8831708
1993	1773421013.6638806
1994	2005768462.9305542
1995	1924672315.824976
1996	2053046324.5447924
1997	2393892898.3929734
1998	2427394611.1443725
1999	2449993087.148387
2000	2681880199.919907
2001	2910453534.5916853
2002	3018795749.2943177
2003	2842841238.4606414
2004	3180855037.040185
2005	3211158735.2805285
2006	3298242644.4971585
2007	3616308566.3914347
2008	3921828809.1423087
2009	3923537734.310401
2010	4266392134.4292293
2011	4441254944.931399
2012	4637792501.621471
2013	5182629088.815117
2014	5887425687.182982
2015	5994898232.044643
2016	6459620806.688842
2017	6604595960.215843
2018	7005495708.029466
2019	7233384607.955385
2020	6928464818.503143
2021	7264617301.419556
2022	7707444908.033483
2023	7876472374.0899515