Year current US$ 2000 30000000 2001 35000000 2002 36000000 2003 50000000 2004 67000000 2005 74000000 2006 84000000 2007 93000000 2008 110000000 2009 111000000 2010 110000000 2011 129000000 2012 146000000 2013 215000000 2014 176000000 2015 160000000 2016 176000000 2017 182000000 2018 191000000 2019 185199996.94824198