Year	current US$
2000	0.15062293
2001	0.13647036
2002	0.08536684
2003	0.25702411
2004	0.34693581
2008	0.48422609
2009	0.33559689
2010	0.43277007
2011	0.42702639
2012	0.38481796
2013	0.51295964
2014	0.79192833
2015	0.27872405
2016	0.28997199
2017	0.11218485
2018	0
2019	0
2020	0
2021	0.00240103