Year	current US$
1975	173853062.59065047
1976	286578511.5621529
1977	351377554.1323574
1978	408069622.36827445
1979	575808862.2754492
1980	975007960.199005
1981	1048990794.9790795
1982	1099530332.922318
1983	1089019577.30812
1984	1245251944.1674976
1985	1184542898.2725527
1986	1391979209.039548
1987	1751888794.1534715
1988	2057181806.7754076
1989	2348366627.218935
1990	2879463636.3636365
1991	2716934974.7474747
1992	3418539504.5632334
1993	3129819787.9858656
1994	3541279880.952381
1995	6631689521.3454075
1996	7029131744.040151
1997	6605714937.286203
1998	7040542986.42534
1999	7025878101.402373
2000	6986380772.855797
2001	7092287795.992714
2002	7126828846.153846
2003	8402847112.117781
2004	9853627500
2005	10265955726.89964
2006	10726039392.798897
2007	12765499589.378592
2008	13945071041.453054
2009	12691264735.168436
2010	12986277677.40296
2011	14775539586.870745
2012	13845815484.999851
2013	14686484667.496737
2014	15317885057.96042
2015	13939933271.45827
2016	14834392301.877684
2017	16942950376.351606
2018	19189606173.342674
2019	19846291512.946114
2020	20353922097.042084
2021	26360403904.15532
2022	27799036103.554787
2023	28798130178.597893