Year current US$ 2005 0 2006 0 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0 2013 0 2014 0 2015 0 2016 13507646.3271561 2017 15584663.3835892 2018 14256282.6687645 2019 14148597.5605371 2020 9008669.81895839 2021 10213438.5342959 2022 10213438.5342959 2023 10213438.5342959