Year	current international $
2000	8.33989309889322
2001	10.5522170047917
2002	11.1735625524862
2003	9.83264756765882
2004	14.7226714951051
2005	17.1187754918164
2006	17.8739569063769
2007	15.3007225963157
2008	15.4314420936194
2009	19.2341928569733
2010	15.6771563726616
2011	19.4654271617417
2012	16.7674661167972
2013	38.9256282905951
2014	33.8805982545022
2015	56.8789297656496
2016	20.8765004362679
2017	21.8519555836386
2018	19.4669307400462
2019	20.5432135574461
2020	20.3764871979706
2021	22.0451789312522