Year current US$ 1997 9999.99977648258 2004 4969999.79019165 2006 19999.9995529652 2010 19999.9995529652 2012 9999.99977648258 2015 0 2016 9999.99977648258 2017 0 2018 9999.99977648258 2019 0 2020 289999.99165535 2021 9999.99977648258