Year	current international $
2000	2.84899230356517
2001	2.77886440711189
2002	4.12399266504394
2003	2.75384874741566
2004	2.25244061831007
2005	5.83957061528202
2006	5.05671479200218
2007	5.05253354183275
2008	5.95122697839464
2009	6.87493605972605
2010	13.3213351748184
2011	9.71734728534862
2012	11.0596191513454
2013	11.4887307541901
2014	23.1659296719163
2015	23.7827814008968
2016	23.0875758567699
2017	24.8872258220376
2018	31.1764167811023
2019	30.9902980864993
2020	30.9111373211323
2021	30.6959394950408