Year	current US$
1970	95000000
1971	110000000
1972	86000000
1973	77000000
1974	90000000
1975	77000000
1976	95000000
1977	104000000
1978	127000000
1979	164000000
1980	212000000
1981	268000000
1982	239000000
1983	249000000
1984	343000000
1985	397000000
1986	293000000
1987	283000000
1988	247000000
1989	262000000
1990	318000000
1991	356000000
1992	314000000
1993	327000000
1994	320000000
1995	274000000
1996	211000000
1997	271000000
1998	206979999.2702902
1999	260130002.97546378
2000	304439996.21085835
2001	296050002.19494116
2002	525920009.0318918
2003	624110002.0855666
2004	677140008.1943716
2005	664369995.1767924
2006	1319629988.6070192
2007	830340001.2534121
2008	1288920001.9035492
2009	1508619999.8110538
2010	1700400018.3343878
2011	1842560015.2499971
2012	1917430000.424385
2013	1974009960.874915
2014	1952130001.3661382
2015	2369249991.357326
2016	2405300007.3432937
2017	2450250030.755996
2018	2576330002.546311
2019	2268309999.3169312