Year current US$ 1990 140887105.162658 1991 132823851.760484 1992 129570920.319204 1993 86659859.3253491 1994 95216056.9044068 1995 79029411.149608 1996 29956835.4581137 1997 60017750.5067496 1998 15429627.3242601 1999 -7827397.19733325 2000 168002877.510199 2001 234343520.927735 2002 138029544.647615 2003 223632601.651107 2004 271793764.612037 2005 535701226.681221 2006 413016795.883507 2007 509601637.161358 2008 153252651.868659 2009 -17838354.9735568 2010 -177569532.241544 2011 -561881541.487269 2012 -41250851.8106081 2013 230853827.162206 2014 255189172.901414 2015 214766061.02905 2016 92953342.5489883 2017 64281246.4519918 2018 185694796.442764 2019 47119492.0139034 2020 61428834.6864768 2021 251239606.173939