Year	current international $
2000	2.089825420148905
2001	2.276476885496753
2002	2.5361432776616706
2003	3.0019293757035284
2004	4.010114941425824
2005	4.320050574887518
2006	4.598706788824602
2007	4.800776426383198
2008	4.932814960700563
2009	5.431881629403585
2010	5.557541062538326
2011	6.101318793660013
2012	6.056322809770379
2013	6.519572685133427
2014	6.687212882710202
2015	6.098486747107411
2016	6.2187201597693065
2017	6.197401155982967
2018	6.167048094026726
2019	6.583126780860979
2020	6.365883050409392
2021	10.02134876532647