Year current US$ 2005 1956541.87559633 2006 2379389.45359663 2007 3165747.43640696 2008 13961577.5076745 2009 2256131.71551575 2010 8659050.48636486 2011 10811522.2785225 2012 4136654.91379861 2013 2015944.6860262 2014 1655644.82417679 2015 1146216.90348751 2016 1046781.90068084 2017 1478393.21245119 2018 1879683.25664314 2019 1506448.33608411 2020 1287785.13518905 2021 2477220.76372517