Year	current international $
2000	19.6899511496212
2001	22.2567831718767
2002	18.0301395185896
2003	20.1365750194251
2004	22.9911204865011
2005	21.4918766549218
2006	22.5977586446631
2007	21.3878406288551
2008	17.0396332634716
2009	19.9136188093404
2010	17.3229966119405
2011	15.3125719248373
2012	18.1296331377737
2013	19.8109956437352
2014	15.7976187836837
2015	16.4994591798247
2016	13.65615996855
2017	13.3654806969606
2018	13.9720032269364
2019	10.2462306827982
2020	9.27582880729784
2021	11.9665972992568