Year	current international $
2000	12.734787799889782
2001	14.184872466370301
2002	14.150645251066372
2003	15.639355979387817
2004	16.70597917465945
2005	17.2928219914159
2006	18.843529499818956
2007	20.591074288815964
2008	21.311817594806524
2009	23.459567879104192
2010	21.2199452190284
2011	20.276676626016314
2012	22.195345931428385
2013	23.479173599167666
2014	25.5068760005325
2015	24.845068061999747
2016	27.60517829271324
2017	28.479496164235194
2018	28.120929965095886
2019	28.682454752721327
2020	33.0925080387808
2021	33.66523693067204