Year current US$ 1995 63000000 1996 72000000 1997 94000000 1998 110000000 1999 110000000 2000 170000000 2001 188000000 2002 197000000 2003 219000000 2004 252000000 2005 328000000 2006 465000000 2007 621000000 2008 800000000 2009 796000000 2010 876000000 2011 1111000000 2012 1521000000 2013 1886000000 2014 2020000000 2015 1806000000 2016 2049000000 2017 2405000000 2018 2522000000 2019 2531000000 2020 724000000