Year current US$ 2009 436790008.544922 2010 366239990.234375 2011 451279998.779297 2012 396453399.658203 2013 472527954.10156304 2014 470248992.919922 2015 662637207.03125 2016 533313171.386719 2017 525309692.382813 2018 517344482.421875 2019 544872741.699219 2020 271630096.435547 2021 606257263.183594 2022 191287224.59450364