Year	current US$
1972	7654613509.504369
1973	9546591324.087067
1974	11569961942.342552
1975	14193195504.12332
1976	14800868279.024567
1977	15455678192.007742
1978	17363293577.944427
1979	19512179192.178158
1980	21119502930.085163
1981	24056038961.93381
1982	23252510413.06487
1983	21755667088.84688
1984	23126114247.696266
1985	23320453050.70222
1986	24321942440.06016
1987	25567557506.859184
1988	28873905332.59603
1989	28867591551.26782
1990	28120656969.860332
1991	24971028458.022106
1992	22815345023.67653
1993	20218963992.147987
1994	23143262788.116695
1995	27768438077.38001
1996	29621046683.016716
1997	27489954777.424465
1998	24684789962.20117
1999	26570698403.38266
2000	29128448479.99679
2001	30765261108.84674
2002	31589119970.87467
2003	34760454081.63749
2004	39238796238.73355
2005	44603695998.10794
2006	49685068456.59943
2007	53445412521.63089
2008	56799690054.53241
2009	57381800563.95412
2010	58353165044.75882
2011	63216019000.20631
2012	68805659758.49493
2013	74969137046.14577
2014	77327154450.50394
2015	81916050561.4658
2016	84810814985.26964
2017	90098676168.52458
2018	97808466656.65091
2019	100934099636.86209