Year	current US$
2012	29604570.4311691
2013	37065675.2847135
2014	27699640.3168887
2015	38034399.6463344
2016	31080759.474076297
2017	35551080.5537924
2018	29878050.3785238
2019	40643089.7265673
2020	28109453.7489116
2021	30477070.1639354
2022	19349701.94287599