Year current US$ 2012 289367.914199829 2013 558221.399784088 2014 308459.997177124 2015 376190.006732941 2016 278010.01071929897 2017 300940.00697135896 2018 697689.890861511 2019 707520.008087158 2020 279609.143733978 2021 321700.006723404 2022 673885.881900787