Year	current US$
2006	219073343.20362
2007	252602540.329664
2008	257471112.291501
2009	257454789.752348
2010	250648552.154456
2011	248816294.952319
2012	252330188.596852
2013	255695258.884404
2014	269343024.758082
2015	268737799.111965
2016	276361502.460099
2017	295514141.748585
2018	302083971.06814
2019	314105268.634219
2020	333037117.724504
2021	324605770.707978