Year	current US$
2000	12.817126172866017
2001	12.45391728044917
2002	12.493176319847038
2003	17.00145303494724
2004	18.35834184456645
2005	21.086950320743963
2006	25.788310895722937
2007	29.959485554598267
2008	34.70424382277078
2009	31.697068265240233
2010	35.577028948551636
2011	38.74313543882195
2012	42.5622189591399
2013	46.420347255434606
2014	45.84824747978571
2015	43.43711561614223
2016	38.84377483090184
2017	39.19415662726664
2018	38.846859849655154
2019	38.92164127083434
2020	39.986663617304025
2021	43.333481835130875