Year	current international $
2000	5.862573229751901
2001	3.7903692203064834
2002	5.063555821866523
2003	7.526899324161376
2004	7.304584835967066
2005	7.850989271233811
2006	9.081874622427753
2007	10.047370012004858
2008	11.788281885495506
2009	11.16617670563108
2010	11.992146381304318
2011	13.627328839767696
2012	12.302453158063381
2013	16.75775191309238
2014	17.957960627044898
2015	14.61676636554404
2016	15.77567382188018
2017	14.244338624785906
2018	14.715024997539341
2019	17.604093774713704
2020	15.917476906044161
2021	20.177516477627428