Year	current international $
2000	3.42691882915948
2001	7.97933125808357
2002	7.80826847656784
2003	11.3157460673433
2004	14.8189151239097
2005	14.6525895402449
2006	15.7698557710776
2007	15.4044941751448
2008	14.5596921037725
2009	12.1220299948882
2010	8.81810035292471
2011	8.23910145680524
2012	8.65384998186923
2013	10.2941167432554
2014	12.69945850517
2015	13.0383538088446
2016	15.1811858031166
2017	17.0702941837704
2018	14.6181046686525
2019	14.6634710485297
2020	17.7185046319002
2021	17.8475245986506