Year	current international $
2001	2278.64788902235
2002	2061.25775974661
2003	1934.95033287606
2004	2041.53506482988
2005	2135.70673139098
2006	2371.49181954293
2007	2613.30255980514
2008	2927.47288995176
2009	3054.51777626153
2010	3005.61575575417
2011	3635.78089001223
2012	3803.12825262051
2013	3566.66226498153
2014	3585.31553519227
2015	3488.40819563987
2016	4200.51951499563
2017	4211.33015209774
2018	4443.60834389163
2019	4529.92258872046
2020	4532.26986826906
2021	4768.37527500352