Year	current international $
2000	5.192423030052762
2001	3.821741481170421
2002	4.409537046080901
2003	5.259562176911546
2004	6.982773489182966
2005	7.714216709626408
2006	9.722535238352966
2007	10.385636702515683
2008	11.059186156235322
2009	12.164651478736316
2010	13.273884790227514
2011	15.143961686732114
2012	14.102020558648974
2013	17.518000647308618
2014	19.189663274359322
2015	18.233263611647484
2016	20.222762498555866
2017	21.5200366380559
2018	20.230740016601125
2019	21.36516775253577
2020	21.28757098151649
2021	23.955461352017757