Year current US$ 1990 13059507677.106731 1991 10337322750.351027 1992 9905421680.260986 1993 10152473299.60652 1994 10775510204.081633 1995 11080338580.338581 1996 13560687738.476679 1997 14068689828.314558 1998 12105405955.36865 1999 11874921669.382128 2000 12944601726.784246 2001 13275181630.158173 2002 15613971475.018534 2003 13505532906.231798 2004 18818466353.677624 2005 20076752778.62349 2006 20439533452.431046 2007 18861584360.524456 2008 24735127856.653004 2009 21371731325.964737 2010 25325453168.21393 2011 32062689854.60379 2012 35096240108.39773 2013 36045842391.387985 2014 32608166776.37347 2015 32108332341.8732 2016 29033286552.02334 2017 35878453847.01825 2018 35130065420.27098 2019 29470558407.21952 2020 26731002694.149357 2021 35861714839.28653 2022 45295542786.82304 2023 41085490449.460884