Year	current international $
2000	28.748165581382636
2001	29.437504999426462
2002	32.71616544681518
2003	33.87234410539863
2004	35.44007650504748
2005	36.72490696746387
2006	40.50865670225203
2007	42.738656552480144
2008	44.001838127113786
2009	44.53338241965073
2010	44.80617392812917
2011	45.834235578957795
2012	46.316887072456375
2013	51.771115000500586
2014	51.81254201226958
2015	54.01477779592107
2016	56.428896551619815
2017	55.883790675104585
2018	54.33628913053079
2019	56.547931090259524
2020	53.776083364858415
2021	57.25963103604447