Year current US$ 2012 222149.834036827 2013 318928.301334381 2014 221129.99856471998 2015 363840.013742447 2016 410699.993371964 2017 258610.01014709502 2018 67119.1290020943 2019 189050.003886223 2020 126436.21861934701 2021 246000.00679493 2022 43497.0334172249