Year current US$ 2012 255399.04832839998 2013 323489.457368851 2014 225999.996066093 2015 238250.002264977 2016 277220.010757446 2017 344370.007514954 2018 433729.916810989 2019 578119.993209839 2020 624025.1064300541 2021 537500.023841858 2022 668521.702289581