Year current US$ 2012 326563.537120819 2013 337605.983018875 2014 383080.005645752 2015 443410.00914573704 2016 388049.989938736 2017 271429.985761642 2018 377349.22766685503 2019 696439.9814605709 2020 674637.317657471 2021 639999.985694885 2022 446540.53449630697