Year	current US$
2006	45119998.9318848
2007	42240001.6784668
2008	46900001.5258789
2009	36720001.220703095
2010	49409999.8474121
2011	39139999.3896484
2012	33009998.321533203
2013	41060001.373291
2014	39079998.0163574
2015	31511814.117431603
2016	34522415.1611328
2017	36833889.007568404
2018	46613063.812255904
2019	40851951.5991211
2020	37641807.5561523
2021	40163497.9248047
2022	39696925.822645426