Year	current US$
1960	100000000
1961	163636363.63636366
1962	236363636.36363637
1963	200000000
1964	264705882.3529412
1965	262068965.5172414
1966	238888888.8888889
1967	225714285.7142857
1968	209913793.10344827
1969	301612903.2258064
1970	356451612.9032258
1971	472580645.1612903
1972	286252354.0489642
1973	424737456.24270713
1974	615300546.4480875
1975	495840787.11985683
1976	528043609.93337375
1977	523993974.6072735
1978	630267308.6501744
1979	860525644.2970146
1980	1265513060.7296374
1981	1595765774.112851
1982	1441500036.0932648
1983	741389341.4009775
1984	659313330.8285475
1985	683637154.4940488
1986	842518853.0977191
1987	974304059.0275006
1988	1000181307.4779571
1989	1041569405.2268431
1990	1124906368.962722
1991	1340465181.7473977
1992	1491814697.9051921
1993	1826577506.9447758
1994	2074487942.6049237
1995	2284689084.895259
1996	2628232302.4077396
1997	2646649045.7943916
1998	2766564374.0300846
1999	2923966073.743529
2000	2820054477.8699975
2001	2610682119.5429096
2002	1680104579.359793
2003	1444162253.1615531
2004	1506183146.4823472
2005	1898708010.2620249
2006	2227871421.1785493
2007	2732027936.5728593
2008	3800663973.9138036
2009	4233697464.235062
2010	5304999029.127423
2011	6423921907.6443615
2012	7198701277.536456
2013	8294336855.77812
2014	8422759452.422511
2015	7980540587.7558565