Year current US$ 2005 0 2006 1182490000 2007 1450138212.08335 2008 1390779867.42441 2009 1346066952.36915 2010 1261415800.63611 2011 1175291441.14365 2012 1190775526.82694 2013 1224886398.23913 2014 1335682709.83224 2015 1445391571.511 2016 1445943330.07813 2017 1505955305.05222 2018 1446756401.43 2019 1547229197.94004 2020 1574100922.76201 2021 1655608129.09726 2022 1799598534.0445 2023 1800000000