Year	current international $
2000	3.4803061725846205
2001	3.477572221972224
2002	3.8423943374776397
2003	4.606690777629313
2004	5.219885449221296
2005	5.430279871445258
2006	6.3602552692381815
2007	6.296383689411453
2008	6.086814393640495
2009	6.290780469394965
2010	6.3477636486120215
2011	7.058559886877519
2012	7.591351402936899
2013	8.287060026159075
2014	8.807971031407604
2015	7.967339817913443
2016	8.340683967853293
2017	7.658918986782896
2018	7.712202119749036
2019	8.798824263575408
2020	8.393205535453642
2021	14.668027946966424