Year	current US$
1960	46380000
1961	51230000
1962	58050000
1963	62660000
1964	77080000
1965	136440000
1966	164260000
1967	240650000
1968	254800000
1969	232910000
1970	227750000
1971	222912605.191697
1972	240950898.446828
1973	270732330.075436
1974	312812444.311808
1975	458894160.772862
1976	471466466.074829
1977	643149176.444232
1978	885558177.671198
1979	1166119654.63242
1980	1142804897.63029
1981	1086681467.55742
1982	884057701.384905
1983	824155117.024295
1984	514987311.202313
1985	422777328.646749
1986	437137959.463261
1987	424658619.075317
1988	109553827.83168
1989	470686411.543617
1990	848838539.78461
1991	825772823.241643
1992	767181313.679926
1993	1637376377.61699
1994	1692568232.10993
1995	1972921532.32807
1996	1759324396.92163
1997	2200295185.3331
1998	1750381290.17269
1999	2629076639.43145
2000	3331283629.2237
2001	3062239352.98524
2002	3975920205.50553
2003	5194288597.85337
2004	5266618728.33555
2005	5250317795.78652
2006	6721971588.46786
2007	7541997596.1265
2008	8561617329.26497
2009	11689284071.4804
2010	13056728538.0758
2011	11467250533.4281
2012	8089514013.45112
2013	13223785948.1698
2014	15299486176.5456
2015	15162094982.6299
2016	14019407210.4578