Year	current international $
2000	11.189336735876
2001	11.7408906273255
2002	11.1182869436039
2003	10.9334271712965
2004	13.9053443962336
2005	14.2747493410694
2006	17.3946677509898
2007	18.5731230359587
2008	19.51578394202
2009	21.8067706913288
2010	22.9927589779923
2011	23.4911339961919
2012	23.3721861409744
2013	30.3996124134073
2014	27.9105639758988
2015	30.6552319292007
2016	34.2621328720031
2017	37.9508857187109
2018	37.6675084944397
2019	40.5805965495238
2020	49.740227169866
2021	52.90953879197