Year	current international $
2000	2.21911699554743
2001	2.89118870885317
2002	3.32010172283846
2003	3.41707447744105
2004	3.83648760717606
2005	4.03639339799666
2006	3.86363916195853
2007	4.28975808480642
2008	4.64254074656531
2009	5.64082765965783
2010	5.97435784894979
2011	6.34575534807165
2012	7.50295893636855
2013	7.72356100891905
2014	7.60276292615906
2015	7.45733188784387
2016	6.71261262381214
2017	6.918789099562
2018	7.08649972730399
2019	7.15628954964455
2020	7.24005501472542
2021	11.7287325048123