Year	current international $
2000	32.4459541557094
2001	33.538550795913
2002	31.1728383798662
2003	33.5371745981853
2004	35.5877144828727
2005	37.0444265766952
2006	34.5282341522237
2007	29.3037226410983
2008	25.1607212651001
2009	22.3354321629369
2010	18.4557188422438
2011	15.771172398251
2012	17.1580578390378
2013	18.7790266896366
2014	18.3281187382717
2015	18.2002018562373
2016	18.0264535068087
2017	17.3004529400764
2018	17.1937401008271
2019	17.2141490925492
2020	17.2089280258794
2021	16.6729052721915