Year	current US$
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0.2681617
2010	0.4983678
2011	4.35478991
2012	2.83695462
2013	15.05081943
2014	22.19612409
2015	23.8751394
2016	3.86725809
2017	2.6990017
2018	2.13658465
2019	2.06843056
2020	2.5350783
2021	2.44615322