Year	current US$
1976	1363021600.5036404
1977	1738406824.8564236
1978	2077382413.0879347
1979	2837517022.7713904
1980	3335403205.504741
1981	4320089095.217487
1982	4413433496.363038
1983	4002434731.835221
1984	3951204921.1241593
1985	3807918910.357935
1986	3427475811.9360166
1987	3899142879.935236
1988	4060198989.0246115
1989	3140576703.5170283
1990	3727972373.5596166
1991	3469992627.0367446
1992	4323657361.234919
1993	4493535695.264927
1994	4394962931.157865
1995	4901826484.018265
1996	5415937799.717913
1997	5180015232.722144
1998	5084211424.541608
1999	4984463328.631876
2000	5795768688.293371
2001	6027365959.409464
2002	6383638928.067701
2003	6967136812.411848
2004	9406911142.45416
2005	11859379407.61636
2006	13231029619.181948
2007	15700423131.170664
2008	19228736858.272964
2009	16459154929.577465
2010	18240845070.422535
2011	21301408450.704227
2012	22976056338.02817
2013	24171830985.915493
2014	24984507042.25352
2015	22694366197.183098
2016	21671830985.915493
2017	23035211267.605637
2018	22915492957.74648
2019	21873239436.61972
2020	18376056338.02817
2021	23232394366.197186