Year	current international $
2000	11.9955832927011
2001	13.062508212183
2002	15.8809244314889
2003	16.5470597248607
2004	15.04415025801
2005	13.2081285668494
2006	14.2547950604764
2007	16.3022262275037
2008	17.6479494427078
2009	16.8311098206866
2010	22.8228448543704
2011	22.1140864728655
2012	20.8415064807871
2013	22.1691848982342
2014	22.0175097729818
2015	17.5212602525245
2016	17.3142354695942
2017	14.2893816920474
2018	15.9142215132154
2019	14.2615918161433
2020	22.508251963541
2021	26.7944440925503