Year	current international $
2000	15.6747165959616
2001	9.80925766932667
2002	18.218610209277
2003	16.5270470124886
2004	15.4704558540439
2005	14.3943969159491
2006	13.6535915374509
2007	12.3251540792143
2008	9.80008591800943
2009	8.72613539168783
2010	8.91903073018074
2011	23.5770415500672
2012	21.1222382938349
2013	18.4425554158797
2014	16.0207376131231
2015	13.4467011437498
2016	17.5259555602451
2017	21.8986738286196
2018	25.6027282626664
2019	28.3793292819166
2020	43.7153320827554
2021	32.9082649410016