Year current US$ 2009 500000 2010 100000.00149011599 2015 59999.9986588955 2016 109999.999403954 2017 140000.000596046 2018 200000.00298023198 2019 200000.00298023198 2020 50000.0007450581 2021 259999.990463257 2022 250000