Year	current international $
2000	3.165525898023199
2001	3.421469614534692
2002	5.547003270206834
2003	4.834283194830463
2004	11.549694411945367
2005	5.2228571792171055
2006	4.603839492843597
2007	4.081957273138435
2008	5.047039704941385
2009	5.414865869645628
2010	6.174506196902279
2011	8.205146818529487
2012	7.153491234126622
2013	5.605697777312733
2014	7.94106331562961
2015	6.937397404168229
2016	5.483544601914238
2017	4.726664121481505
2018	4.79965471182266
2019	4.698762394459513
2020	3.9330166300091407
2021	6.8564186673614635