Year	current international $
2003	17.7597253105302
2004	23.4470466504303
2005	29.1642147884842
2006	19.8393347767003
2007	15.7861233015516
2008	13.2903980735496
2009	11.7876690389102
2010	14.9552122339796
2011	14.6465851900932
2012	15.5004124248356
2013	14.6630758224869
2014	23.4611556512723
2015	25.0118482211866
2016	24.0963315995165
2017	24.6515471245008
2018	20.3420323579004
2019	20.4349150784143
2020	24.9266163519289
2021	16.0381659683204