Year	current international $
2000	2.28384769870167
2001	1.88976606829809
2002	3.10373780031264
2003	2.16237876577118
2004	3.12418560422364
2005	4.61103824976272
2006	4.65100129811204
2007	5.33663436351563
2008	6.34510062628708
2009	5.69748499432109
2010	8.25434120402995
2011	13.8503695354447
2012	9.33845770581666
2013	8.47690840843171
2014	13.5337469036584
2015	12.2486953630445
2016	12.5709819161381
2017	11.8956215087468
2018	19.7679213939346
2019	18.6523015231873
2020	17.6180457020017
2021	26.3633020098713