Year	current international $
2000	6.34314327219412
2001	11.0241916753668
2002	10.9531143917258
2003	16.6333704522888
2004	20.5493543465624
2005	21.1243183670605
2006	23.0176532683539
2007	24.1238783289957
2008	29.3026063630167
2009	26.6945431310214
2010	23.800348536903
2011	21.2216172222099
2012	21.4868859175359
2013	26.1053537375387
2014	32.8012335676715
2015	34.837029011409
2016	40.7090961457657
2017	42.5430873500278
2018	35.1306898349382
2019	38.0899029394024
2020	44.6108354852935
2021	45.6123695180436