Year current US$ 1995 30000000 1996 22000000 1997 21000000 1998 23000000 1999 12000000 2000 8000000 2001 100000.00149011599 2002 300000.011920929 2003 1000000 2004 4000000 2005 5000000 2006 9000000 2007 8000000 2008 41000000 2009 83000000 2010 203000000 2011 237000000 2012 605000000 2013 904000000 2014 1051000000 2015 998000000 2016 912000000 2017 922000000 2018 992000000 2019 1011000000 2020 251000000