Year	current international $
2000	7.87665218858978
2001	8.92421057689549
2002	9.5596577783017
2003	10.8757567465753
2004	12.133249859485
2005	13.9265938533372
2006	13.7110736325452
2007	12.7350635250153
2008	12.7195635580077
2009	12.4673931500428
2010	11.6640435380277
2011	11.442797168484
2012	10.1915989989757
2013	9.27842611907763
2014	8.57767394160482
2015	9.59687594769141
2016	9.36004015079357
2017	9.46989401334887
2018	8.9061407867968
2019	9.57879837780138
2020	9.27303719904952
2021	9.3630036020427