Year	constant 2010 US$
1968	190552228717.135
1969	213469732047.984
1970	240785930696.788
1971	263815519411.44
1972	272304024503.594
1973	283618078626.535
1974	309253344136.449
1975	308250775383.732
1976	331338382353.346
1977	347087411046.642
1978	346136701516.704
1979	367817165569.562
1980	385884991051.316
1981	369540079432.011
1982	365496551571.821
1983	346763289138.918
1984	348741983201.295
1985	361765801610.777
1986	370763392017.453
1987	385654169006.369
1988	399978912534.44
1989	405956686510.235
1990	446110960033.793
1991	401208091777.478
1992	413105476300.642
1993	412175592148.44
1994	412698171623.696
1995	425809164831.951
1996	451370139314.916
1997	478631516876.973
1998	515756854023.728
1999	540243492900.064
2000	556383506979.496
2001	583364899675.468
2002	618820568291.193
2003	616783991058.346
2004	696411000914.746
2005	743827394389.68
2006	797506012081.123
2007	849994759141.909
2008	908483875227.96
2009	954586787033.045
2010	1014764538526.14
2011	1061109066063.5
2012	1120972859440.56
2013	1187814652807.34
2014	1244837545822.06
2015	1283064976381.01
2016	1318302358467.95
2017	1340886601330.28
2018	1370455310077.52