Year current US$ 1995 10497000000 1996 11461000000 1997 12678000000 1998 13474000000 1999 13134000000 2000 12502000000 2001 12317000000 2002 12418000000 2003 11447000000 2004 13270000000 2005 13305000000 2006 14044000000 2007 15042000000 2008 16095000000 2009 15547000000 2010 17357000000 2011 19022000000 2012 20077000000 2013 21215000000 2014 22011000000 2015 23059000000 2016 24141000000 2017 25386000000 2018 26436000000 2019 26879000000 2020 5520000000