Year	current US$
2011	26700000.10728837
2012	26705267.48895646
2013	36990282.53555296
2014	30313000.142574318
2015	41677506.029605865
2016	31410958.051681526
2017	34086172.75953291
2018	36054628.96823883
2019	31891402.304172516