Year	current international $
2000	13.4391202438666
2001	16.8905435947343
2002	19.9405432972227
2003	20.0681465888706
2004	17.6551729173852
2005	16.7405282324631
2006	17.3274666644918
2007	15.8508736625566
2008	15.6332522200569
2009	12.760751590521
2010	11.7142067217933
2011	16.9432604549745
2012	19.345742937463
2013	15.3441507936393
2014	19.8713935601931
2015	12.5079298951831
2016	13.0239678300171
2017	5.21212357061091
2018	13.4269730043362
2019	15.9292572996274
2020	23.476629546543
2021	19.712640191624