Year current US$ 2011 2549999.95231628 2012 -320373.505353928 2013 1481925.2490997298 2014 845513.939857483 2015 58040.6002700329 2016 16862.9996478558 2017 -1171.99996020645 2018 780272.424221039 2019 5644381.04629517 2020 2436749.93515015 2021 9957940.10162354 2022 7607035.63690186