Year current US$ 1995 27587000000 1996 28352000000 1997 27402000000 1998 29490000000 1999 37754000000 2000 32857000000 2001 32188000000 2002 35036000000 2003 39421000000 2004 44906000000 2005 43937000000 2006 46527000000 2007 54200000000 2008 57262000000 2009 49616000000 2010 46459000000 2011 55154000000 2012 53327000000 2013 56451000000 2014 58422000000 2015 58326000000 2016 55338000000 2017 59232000000 2018 65362000000 2019 63424000000 2020 32646000000