Year US Dollars adjusted for inflation) 1960 2074788352.16769 1961 2169116385.33276 1962 2392073643.93899 1963 2617603832.61695 1964 2621033937.78947 1965 2802403243.47257 1966 2791684129.57825 1967 2795114234.75077 1968 2805833348.64509 1969 2651906851.56168 1970 2732943262.16684 1971 2888155873.03214 1972 2738945876.00495 1973 2272021788.82969 1974 2471397109.35847 1975 2402366207.53131 1976 2418659136.88698 1977 2606457887.5654 1978 2957615854.33786 1979 3168996543.09375 1980 3098250448.00614 1981 3117116167.1292 1982 3167710148.21005 1983 3017214037.40098 1984 2509557064.63294 1985 2703358710.25128 1986 2875293048.849 1987 2877436759.3844 1988 3075954623.71057 1989 3104681860.221 1990 3064806711.68607 1991 3141555701.71359 1992 2936837964.79057 1993 2979405606.60121 1994 3098717742.53644 1995 3179462761.52286 1996 3288171553.37277 1997 3378726667.59467 1998 3730866430.77849 1999 3709646817.10266 2000 3657358998.36197 2001 3917190239.0117 2002 4034671554.6476 2003 4248509146.97587 2004 4252757656.15835 2005 4444131750.65835 2006 4701891392.26459 2007 4849839714.84673 2008 5314826497.89012 2009 5276949261.50372 2010 5718589799.24366 2011 5848875557.91486 2012 6541956735.68851 2013 6886614158.92658 2014 7405110304.91297 2015 7726313711.61805 2016 8106889865.37629 2017 8503682934.86128