Year current US$ 2002 1600000.02384186 2003 1500000 2004 1200000.04768372 2005 1600000.02384186 2006 2099999.90463257 2007 3299999.95231628 2008 4199999.80926514 2009 2400000.09536743 2010 2500000 2011 1100000.02384186 2012 1600000.02384186 2013 1299999.95231628 2014 1200000.04768372 2015 1000000 2016 3599999.90463257 2017 7599999.90463257 2018 8899999.61853027 2019 13699999.8092651 2020 6400000.09536743