Year	current international $
2000	7.35607200756032
2001	7.60048297507372
2002	6.69088220006959
2003	6.77091659026341
2004	6.95808156662806
2005	7.17069707702482
2006	7.32754223465086
2007	7.30587934943711
2008	7.37153173423843
2009	7.71965360259732
2010	8.28312425401421
2011	8.33412361913191
2012	8.64300778487597
2013	8.71632921458153
2014	9.04971232766316
2015	9.17329425695855
2016	9.27487809541694
2017	9.0520701313983
2018	8.86335582355644
2019	8.56710944472524
2020	10.496114232058
2021	9.96034256869698