Year	current US$
2005	1184332070.2151918
2006	1200638663.1999164
2007	2296633904.065341
2008	2841340235.4211583
2009	2466379598.022735
2010	4353086146.809588
2011	4940143566.099431
2012	4959835219.576658
2013	5396743781.102642
2014	5907496043.168228
2015	5973784036.045164
2016	6201859672.553941
2017	5082630574.703126
2018	6530976049.607048
2019	5973353699.900689