Year current US$ 1995 7605000000 1996 8545000000 1997 8880000000 1998 8307000000 1999 8798000000 2000 9065000000 2001 8184000000 2002 8640000000 2003 10434000000 2004 14702000000 2005 16153000000 2006 17293000000 2007 22052000000 2008 25557000000 2009 22680000000 2010 27851000000 2011 33967000000 2012 35226000000 2013 35197000000 2014 35666000000 2015 34071000000 2016 35718000000 2017 39710000000 2018 42439000000 2019 41345000000 2020 7654000000