Year	current international $
2003	1.93929269370692
2004	5.07786972285205
2005	4.11873696482465
2006	6.09112657605911
2007	6.26631736321404
2008	5.59682546886849
2009	4.94387831461821
2010	24.7080558183096
2011	20.4190071848587
2012	5.89309456196165
2013	2.02714679664541
2014	4.21236743854543
2015	3.81801130887746
2016	3.76539250011574
2017	0.598858658396066
2018	0.577521482768113
2019	0.552898985144604
2020	0.550756643343872
2021	0.517207809968029