Year current US$ 2012 278380.423784256 2013 418875.247240067 2014 222589.99943733198 2015 304309.993982315 2016 243939.995765686 2017 251480.01313209502 2018 841515.183448792 2019 484369.993209839 2020 754066.824913025 2021 661599.99370575 2022 555373.251438141