Year	current US$
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0.40494455
2006	4.0914567
2007	11.2991861
2008	6.48782265
2009	5.52422398
2010	14.71840094
2011	20.29454071
2012	8.45192213
2013	4.43274081
2014	5.44168101
2015	4.79524145
2016	1.52524997
2017	4.11552688
2018	1.37150656
2019	5.79770341
2020	12.07629854
2021	15.10137155