Year	current US$
2000	0.23292532540905866
2001	0.28313589370988407
2002	0.30205806755092374
2003	0.4760445695295275
2004	1.1404931602764476
2005	1.0386741015420604
2006	0.838236641152609
2007	1.27409367714758
2008	1.2985032566971724
2009	1.1777185164845523
2010	1.3005623109088769
2011	1.3938335255804855
2012	1.2482422802965454
2013	1.1829044461768656
2014	0.9546378084374575
2015	0.6679460238565433
2016	0.6515449495329695
2017	0.6062824950179968
2018	0.476468330456313
2019	0.5569486226993431
2020	0.6143702856693034
2021	2.0482114175685115