Year	current US$
2008	216603835.92
2009	624996676.79
2010	788698416.8004
2011	454083461.9711
2012	323642538.268423
2013	444730790.483326
2014	524163478.528778
2015	228991809.215134
2016	167894464.282526
2017	143979106.230961
2018	234618700.600525
2019	217292317.990937
2020	225420606.479917