Year US Dollars 1960 37360000.61035 1961 50020000.45776 1962 40970001.2207 1963 50169998.16895 1964 83080001.83105 1965 75879997.25342 1966 62819999.69482 1967 54939998.62671 1968 100629997.25342 1969 70440002.44141 1970 77809997.55859 1971 62409999.84741 1972 82080001.83105 1973 63950000.76294 1974 81970001.2207 1975 142970001.2207 1976 108040000.91553 1977 110300003.05176 1978 147419998.16895 1979 190539993.28613 1980 212449996.94824 1981 219410003.66211 1982 300339996.33789 1983 353739990.23438 1984 512799987.79297 1985 533890014.64844 1986 537270019.53125 1987 470070007.32422 1988 512210021.97266 1989 422600006.10352 1990 660890014.64844 1991 460059997.55859 1992 447940002.44141 1993 413309997.55859 1994 349390014.64844 1995 456519989.01367 1996 292709991.45508 1997 375309997.55859 1998 404730010.98633 1999 1049099975.58594 2000 583659973.14453 2001 819530029.29688 2002 531520019.53125 2003 405359985.35156 2004 637099975.58594 2005 728809997.55859 2006 574849975.58594 2007 415809997.55859 2008 452839996.33789 2009 429640014.64844 2010 478450012.20703 2011 341010009.76562 2012 548409973.14453 2013 606719970.70312 2014 587869995.11719 2015 578969970.70312 2016 442070007.32422 2017 463380004.88281 2018 672229980.46875 2019 462519989.01367 2020 1183010009.76563 2021 585640014.64844