Year current US$ 2000 4020.246326272295 2001 4325.2670689501965 2002 4374.334703909638 2003 4480.575633425478 2004 5302.643790676331 2005 6023.697381993717 2006 6751.421655337284 2007 7549.252233883776 2008 8721.795278580776 2009 9043.687775254934 2010 9755.34924620394 2011 2205.3103941274044 2012 1516.1756790212698 2013 805.4314665570066 2014 910.0958572916156 2015 737.5537113114807 2016 589.9991571997145 2017 773.8357462285443 2018 997.4330923074825 2019 1018.114089235556 2020 485.69323034919324