Year	current international $
2000	15.560207463584769
2001	16.824184893337385
2002	16.328345836570577
2003	18.229095609939225
2004	19.119973899561067
2005	21.897407381370012
2006	23.245320779365482
2007	25.104381991925855
2008	25.057256450421132
2009	27.963706849408585
2010	27.137991851343244
2011	26.429438542924654
2012	27.7143170675179
2013	28.640022623836273
2014	30.992637711920533
2015	31.60484448834892
2016	35.15574745009301
2017	35.86365850230386
2018	37.018527751503086
2019	39.43987375201669
2020	44.69970207955924
2021	45.036763033668734