Year	current international $
2000	459.43816540616
2001	520.281694514098
2002	574.154346594598
2003	603.643391616872
2004	600.343470548992
2005	908.845176897721
2006	1105.45880914301
2007	1657.71484035288
2008	1790.3126311316
2009	2002.53609699858
2010	1842.69015177103
2011	1920.93071704676
2012	1629.55155672903
2013	1945.97042093376
2014	2437.21280320924
2015	2869.00693788701
2016	2233.11574841458
2017	2200.96540327642
2018	2204.31453804835
2019	2271.80245367126
2020	2361.64331506838
2021	2778.21087521698