Year	current international $
2000	8.66732987890807
2001	9.75884339419087
2002	10.3926826781783
2003	11.7588074234878
2004	13.0510929741301
2005	14.8780188410718
2006	14.6838799028852
2007	14.1898088490774
2008	13.7132867416678
2009	13.5016243000317
2010	12.6953596280984
2011	12.5258175290026
2012	11.2294027116353
2013	9.27841503129137
2014	8.57768564719695
2015	9.59685971687285
2016	9.3600414951882
2017	9.45363834579935
2018	8.90614212757702
2019	9.57879986377243
2020	9.27303431405557
2021	9.36300320530526