Year	current international $
2000	18.2428423582399
2001	19.4657497555585
2002	16.5051684555524
2003	18.9224678134417
2004	15.5346916209099
2005	15.8913642840813
2006	17.1175789282081
2007	14.0231934898122
2008	15.1939174318403
2009	19.6442823566898
2010	20.6975465273339
2011	21.3901986961697
2012	24.5257568607848
2013	21.2483058924635
2014	20.4722957727222
2015	19.1014483453179
2016	24.7467701251109
2017	20.4454357923399
2018	22.036813236027
2019	28.2417850684517
2020	52.2515825800691
2021	36.8635293696853