Year	current international $
2000	4.14050766441316
2001	4.85425993424014
2002	4.95095434732616
2003	5.66610789340804
2004	7.87391030201673
2005	6.11020800897515
2006	7.05945911188005
2007	6.9946371258675
2008	4.30668438882406
2009	5.17905021870889
2010	5.68613580187847
2011	6.30434919955776
2012	7.70827782015686
2013	7.63223952543175
2014	10.658998255099
2015	7.49370228359168
2016	8.59493663095073
2017	4.6274838496722
2018	5.04166772526364
2019	5.2125081085384
2020	4.53682690088587
2021	20.4824625886727