Year	current US$
2011	453361999.658936
2012	473603143.866887
2013	505393436.9491
2014	536065655.92957
2015	531653248.887801
2016	552103438.338865
2017	536778144.618239
2018	526808620.53353
2019	512328888.302571
2020	428930950.172025
2021	464447539.385473