Year	current international $
2000	5.050676185229305
2001	6.216527920260527
2002	7.1812013302111595
2003	7.78819673960013
2004	10.021749746680534
2005	11.706330352937412
2006	14.783609183660708
2007	14.372450135801344
2008	14.818792012851317
2009	17.67078575298773
2010	18.7392955821492
2011	21.296806406699307
2012	20.461079804380752
2013	22.446428935125038
2014	23.23795558827079
2015	23.134207328547724
2016	23.635307487060018
2017	24.685019309992065
2018	25.066833794470288
2019	25.79507462160656
2020	24.83324564676649
2021	31.65878217150942