Year	current international $
2000	19.48190671117217
2001	21.120307587008632
2002	21.202149470215932
2003	22.117260806911755
2004	24.388732077596707
2005	26.123439594643198
2006	26.374211086748993
2007	27.42378590939468
2008	27.189267543790248
2009	29.291713774224057
2010	28.587700963104492
2011	28.70151573235462
2012	31.865572310678726
2013	33.00844783061949
2014	34.63819068031846
2015	36.52461901312572
2016	37.95131287582845
2017	39.82943654719931
2018	41.798992005748936
2019	44.443915270665904
2020	49.660370342031385
2021	50.87335693596155