Year	current international $
2000	8.353630519557779
2001	7.078347595386351
2002	8.568847808108119
2003	8.927203924281269
2004	11.049646602453777
2005	13.228299067511795
2006	17.176508476562518
2007	17.290003319754387
2008	16.445763223359215
2009	19.902889754651454
2010	20.196868304546015
2011	23.29521969506739
2012	22.07896346969695
2013	25.43250395286721
2014	25.131251980676574
2015	23.957246237693212
2016	25.147230943942972
2017	24.384172826161645
2018	24.789871053100793
2019	27.242983776204387
2020	25.134563984032923
2021	30.39075018133153