Year current US$ 1996 1000000 1997 1000000 2003 2000000 2004 4000000 2005 1000000 2006 3000000 2007 2000000 2008 200000.00298023198 2009 1000000 2010 6000000 2011 8000000 2012 10000000 2013 7000000 2014 5000000 2015 8000000 2016 4000000 2017 6000000 2018 14000000 2019 5000000 2020 6000000