Year current US$ 2007 411706 2008 70848 2009 16213.000000000002 2010 74241 2011 95679 2012 41530 2013 119766 2014 105393 2015 90066 2016 161359 2017 254735 2018 82753 2019 95124 2020 1438979 2021 139915 2022 111140