Year	current US$
2000	12.509309079013727
2001	12.714007118819511
2002	13.863387324203199
2003	22.615756195662357
2004	23.693932816323834
2005	26.7928302870767
2006	32.06818813665808
2007	34.568437303625544
2008	40.16287303346914
2009	36.527924650340964
2010	39.204096554704456
2011	42.762485866906324
2012	43.90315284998642
2013	47.761175072759215
2014	49.75665613011046
2015	44.045290565815634
2016	39.2503282033464
2017	38.548576860300415
2018	36.432959529381996
2019	36.05108121220501
2020	37.23734410760214
2021	43.05623580975501