Year US Dollars 1960 964429992.67578 1961 1310819946.28906 1962 1527280029.29688 1963 1530650024.41406 1964 1084569946.28906 1965 1286780029.29688 1966 1403000000 1967 1371260009.76563 1968 1209010009.76563 1969 1088969970.70313 1970 1066209960.9375 1971 1156359985.35156 1972 1173619995.11719 1973 384970001.2207 1974 193350006.10352 1975 205910003.66211 1976 524989990.23438 1977 325869995.11719 1978 458440002.44141 1979 1476859985.35156 1980 2257739990.23438 1981 1825439941.40625 1982 1580040039.0625 1983 877070007.32422 1984 593469970.70312 1985 474130004.88281 1986 702739990.23438 1987 593020019.53125 1988 399850006.10352 1989 222460006.71387 1990 1851599975.58594 1991 2289149902.34375 1992 449880004.88281 1993 653140014.64844 1994 242820007.32422 1995 398730010.98633 1996 280730010.98633 1997 6309999.94278 1998 43849998.47412 1999 41430000.30518 2000 450109985.35156 2001 278890014.64844 2002 413000000 2003 211779998.7793 2004 330049987.79297 2005 453779998.7793 2006 611530029.29688 2007 778159973.14453 2008 1022710021.97266 2009 1253969970.70313 2010 951539978.02734 2011 3025010009.76563 2012 3053639892.57813 2013 2687340087.89063 2014 3231070068.35938 2015 2350120117.1875 2016 3945189941.40625 2017 3341610107.42188 2018 1189160034.17969 2019 719710021.97266 2020 538140014.64844 2021 991289978.02734