Year	current international $
2000	9.0093150283805
2001	6.51506973737342
2002	8.28656671177814
2003	8.34156705988809
2004	8.49768488595875
2005	8.87723122282071
2006	8.60509736362019
2007	7.27446414969889
2008	7.69632132810614
2009	10.6815613765765
2010	14.8912983387208
2011	13.7504582848177
2012	13.4314691617786
2013	13.8770562779797
2014	23.4954666014986
2015	20.1791985906228
2016	17.0284031129825
2017	13.5599389332733
2018	12.6726669743588
2019	21.4443699284879
2020	22.8219009397642
2021	34.3391276601854