Year	current US$
2012	17326987.18085885
2013	20679328.595288105
2014	17710850.033909082
2015	19602430.041879416
2016	21759949.894621976
2017	23799780.196044598
2018	27428423.143923294
2019	52187650.054693244
2020	35624838.7657106
2021	33541310.16135217
2022	30554783.35358202