Year current US$ 2011 159999.99642372102 2012 49798.9989817142 2013 219670.89176178002 2014 55626.910179853396 2015 237287.20843792 2016 131199.74732399 2017 148434.668779373 2018 98950.0284194946 2019 236107.647418976 2020 143262.267112732 2021 167300.00078678102 2022 87663.1811261177