Year	current international $
2000	35.1332868832561
2001	37.1567965158657
2002	36.3665482153584
2003	39.3618465075882
2004	41.700260452635
2005	44.6466696095703
2006	45.9503903512931
2007	46.5202940007453
2008	43.5323231935355
2009	41.2209707492381
2010	42.9249988348312
2011	44.4324608226607
2012	45.5268324394553
2013	49.8771112966563
2014	49.1144409135389
2015	48.2336816324156
2016	47.8495409113262
2017	40.0220229040162
2018	43.7829447241112
2019	50.9077841659569
2020	49.2034485715502
2021	53.9568330890627