Year	current international $
2003	1.8757302179786126
2004	4.31202194456685
2005	3.7342883429059595
2006	4.644617862383062
2007	5.955007280351868
2008	3.1978876857645004
2009	4.436047959128207
2010	2.654881303734265
2011	2.8062967891382655
2012	2.7530700496157543
2013	2.547100305967976
2014	4.742012533967831
2015	2.7035321755722954
2016	3.9517696293237985
2017	2.7742760178944144
2018	2.672968524927283
2019	4.208052743153858
2020	5.839597328513518
2021	8.337744731879924