Year	current US$
2012	35297689.8290217
2013	41765216.0273865
2014	33783420.357853204
2015	40802300.1514375
2016	38297799.7977287
2017	40209310.3588559
2018	38707118.2504296
2019	68372159.8088741
2020	43645178.7315309
2021	42405910.342931695
2022	30554783.35358202