Year	current international $
2000	9.789885217784374
2001	6.64499187075383
2002	7.424590205733334
2003	8.875045019815893
2004	9.75593318877222
2005	10.11101379980381
2006	10.566353543381005
2007	11.011341566574671
2008	11.658239186783863
2009	12.912027804588897
2010	12.897929107099992
2011	15.168954321021696
2012	15.686292479655219
2013	20.86494993279895
2014	24.257968535501625
2015	24.490270566122028
2016	21.1558869044966
2017	17.197971697905484
2018	16.494235202982065
2019	18.977400777252434
2020	19.15271334183122
2021	21.97067367144525