Year	current US$
2000	0
2001	0.66305266
2002	0.83221212
2003	1.142397
2004	2.5235395
2005	4.30141752
2006	4.52058818
2007	5.89786162
2008	12.44390794
2009	19.37158989
2010	15.86681857
2011	18.36995581
2012	15.99638845
2013	25.20866061
2014	23.10899259
2015	24.40144818
2016	20.9635297
2017	23.18192446
2018	20.41139165
2019	12.77743594
2020	13.91316327
2021	19.69864658