Year	constant 2010 US$
1976	530715659.21208
1977	564942076.290287
1978	606178724.073364
1979	567828641.38578
1980	461850456.832596
1981	428861136.112928
1982	368655633.17527
1983	380417501.99344
1984	403765692.884056
1985	444142263.003532
1986	532795164.703166
1987	669197749.435107
1988	938816549.74731
1989	879978874.50766
1990	1084940890.4861
1991	1065845928.89212
1992	1109545612.28834
1993	1162803800.61441
1994	1309317081.73572
1995	1095898396.51939
1996	1255899564.97923
1997	1392792613.50635
1998	1338473702.48131
1999	1647661128.21989
2000	1522263763.06689
2001	1591653292.53188
2002	1591735425.3471
2003	1805688798.41012
2004	1821149789.20869
2005	1770219030.00269
2006	2080007936.2878
2007	2203826117.35851
2008	2232686565.65714
2009	2433530897.81908
2010	2416646093.47592
2011	2451334402.95604
2012	2431571616.87691
2013	2351416928.83827
2014	2209654114.89567
2015	2089576720.83979
2016	2167019918.41796
2017	2269979021.16948
2018	2528254259.5993