Year	current US$
1970	782054000
1971	950479400
1972	1117950367.2612803
1973	1370949819.0591075
1974	1562160609.7560976
1975	1794534268.2926831
1976	1901535079.171742
1977	1949654939.7590363
1978	2435286623.376623
1979	2652556164.3835616
1980	2821721527.7777777
1981	2793351445.7831326
1982	2806893176.470588
1983	2944952852.153667
1984	3132246101.3090496
1985	3965465443.825745
1986	2985691624.6700263
1987	2789121327.737505
1988	3458884300.791557
1989	3206295783.6729465
1990	4324637367.021276
1991	1773744779.5823665
1992	916057972.972973
1993	598653243.2432432
1994	1358527837.837838
1995	1550951104.3023107
1996	3477368700
1997	3055908100
1998	2368683800
1999	2570711100
2000	2961075200
2001	2716400000
2002	2526424100
2003	2807687500
2004	3641800400
2005	5735384400
2006	5844226574.074074
2007	6993518518.518518
2008	6228518518.518518
2009	7439814814.814815
2010	8887962962.962963
2011	8084000000
2012	10043000000
2013	10238000000
2014	10086100000
2015	10516800000
2016	11198407863.699997
2017	12761649691.7406
2018	14003036096.123001
2019	13550600000
2020	11302800000