Year	current international $
2010	87.7049903214728
2011	91.8096081437998
2012	90.6813568561437
2013	92.4044124282473
2014	96.291807209036
2015	107.09820445698
2016	98.4012477022103
2017	54.3102147687373
2018	40.0877796900776
2019	17.139550417068
2020	13.3878765759688
2021	14.0371772143743