Year	current international $
2000	3.0652906571698573
2001	3.31289010663656
2002	5.37797790455266
2003	4.697281826007199
2004	11.143745015761763
2005	5.0855001124824
2006	4.553376014252594
2007	4.076338744160197
2008	4.947391207305595
2009	5.34690051005678
2010	6.146913091924594
2011	7.956897981906054
2012	6.907068240146298
2013	5.429727877948527
2014	7.695631999121083
2015	6.694625564741225
2016	5.261368243199312
2017	4.546542003993636
2018	4.606025591490505
2019	4.195782912542539
2020	3.674757802124725
2021	6.59716436245446