Year	current international $
2000	18.86071812964084
2001	18.71516475806248
2002	19.10304646457882
2003	18.623594506230503
2004	19.118111327890325
2005	22.23797537102019
2006	23.0967623340225
2007	24.858326399223373
2008	27.634940191958403
2009	31.858492375855576
2010	33.54441725261294
2011	37.16547193691549
2012	40.45550704276725
2013	39.68464485216674
2014	40.47332413996658
2015	45.78352343712194
2016	49.638275552097554
2017	54.85527064206846
2018	60.5276563230031
2019	65.58059233081218
2020	71.8046029898783
2021	73.42381491180167