Year current US$ 2010 19999.9995529652 2012 109999.999403954 2013 400000.00596046395 2014 670000.016689301 2015 376816.421747208 2016 431226.819753647 2017 393495.64909935 2018 700795.471668243 2019 463464.707136154 2020 794650.793075562 2021 438296.85449600196 2022 494104.951620102