Year	current international $
2000	6.172573575510818
2001	7.1943872968042895
2002	8.288090181361294
2003	12.865905989808388
2004	16.17690009681624
2005	24.026148758327693
2006	26.051075763424496
2007	27.199664413839834
2008	28.419770835768194
2009	31.861524127954734
2010	33.99094220209751
2011	35.840097407484365
2012	32.17696795800019
2013	33.83082832069491
2014	25.72991211053809
2015	24.934788747526085
2016	27.703414015908677
2017	29.86975702647699
2018	30.30010297381908
2019	32.02954083405088
2020	30.03046336067864
2021	34.11152944532748