Year	current US$
2000	0.01062259
2001	0.08436679
2002	0.21118039
2003	0.47944924
2004	0.32672344
2005	0.35161933
2006	0.42753182
2007	0.47392781
2008	0.65000987
2009	0.56541195
2010	0.46390663
2011	1.21499963
2012	1.3354086
2013	0.58341617
2014	1.1949651
2015	0.94931277
2016	0.76523351
2017	0.44001333
2018	2.00548022
2019	0.48542191
2020	0.83567375
2021	0.9799674