Year US Dollars adjusted for inflation) 1960 2283859425.55787 1961 2425027328.18676 1962 2579600978.543 1963 2684655789.98462 1964 2914738349.25506 1965 3214038834.01893 1966 3400895273.37601 1967 3539327405.26181 1968 3693627577.71976 1969 3999218302.08417 1970 4432845774.97873 1971 4711901952.94773 1972 4977820654.34616 1973 5302835747.69074 1974 5441268003.54655 1975 5393391147.75195 1976 5210638860.38964 1977 5254138086.29117 1978 5703359502.00946 1979 5807867605.59458 1980 5674086209.59007 1981 5658492142.7963 1982 5678463467.57305 1983 5861489604.74373 1984 5840697350.39201 1985 6074336362.04047 1986 6359408433.9215 1987 6535595516.14451 1988 6725731706.76042 1989 6630254572.32037 1990 6430540084.85269 1991 7044457168.8649 1992 8020050048.91553 1993 9479882492.37118 1994 10043187448.7972 1995 9710512008.84744 1996 10461493468.0365 1997 10053035999.1662 1998 9674125690.52791 1999 9853634316.17161 2000 9607801709.4545 2001 9596148540.73567 2002 9580900209.54904 2003 9788240710.71917 2004 10054595942.4082 2005 10692539535.846 2006 10937876230.9341 2007 12151737720.2699 2008 12115978016.9354 2009 12940537460.965 2010 14250726289.854 2011 14408526139.4409 2012 15078295048.9225 2013 15655783372.3492 2014 18070132657.464 2015 19027666624.8742 2016 19389192290.7468 2017 19815754521.1432