Year	current international $
2000	19.5596219113693
2001	36.2158069409438
2002	17.057046792117
2003	19.7926469425057
2004	17.5379417337247
2005	18.607170813234
2006	25.6187250229065
2007	25.0311907016476
2008	49.1735809863572
2009	29.8224519990621
2010	42.682830900113
2011	33.895714164543
2012	49.650675434773
2013	54.4279952239196
2014	53.8035146236088
2015	49.775877188239
2016	44.1618015042415
2017	39.4292797937146
2018	25.9881904431851
2019	43.4487822045258
2020	67.74135301321
2021	61.187869611226