Year	current international $
2000	21.479909545033056
2001	24.249383344420725
2002	27.396890508239764
2003	30.051238395726795
2004	32.262190222694976
2005	34.07333508489142
2006	36.802409580158056
2007	40.50071859789576
2008	42.527880267818475
2009	44.35127402583559
2010	44.832506812545454
2011	45.10776998529268
2012	47.68115438930561
2013	54.34001341180647
2014	56.841846439263804
2015	61.537390423702576
2016	64.34408044728748
2017	63.89911469937007
2018	64.24104486634772
2019	67.85028055497727
2020	66.94323758053055
2021	69.30610592978806