Year	current international $
2000	5.65233049917169
2001	5.38432726889776
2002	6.44700057660499
2003	10.3948130993504
2004	12.1947579434524
2005	16.4488368786199
2006	19.9607473621948
2007	29.1963751122036
2008	23.119161987681
2009	21.4867578475026
2010	31.5708714288302
2011	23.3077063093037
2012	27.5776241026947
2013	26.7500571022521
2014	19.3321122780631
2015	20.9906478264453
2016	25.6303705288114
2017	21.5610440499913
2018	15.9625346552408
2019	18.4789605569227
2020	26.0702294741927
2021	27.6161934280531