Year	current US$
2000	0.21681719
2001	0.26050765
2002	0.49902765
2003	0.84089699
2004	1.22551097
2005	0.61403295
2006	0.32227432
2007	1.67918131
2008	1.20434722
2009	2.71668276
2010	0.76967332
2011	1.17197421
2012	1.61708297
2013	0.57732275
2014	1.91804068
2015	1.77208772
2016	0.50376038
2017	0.48436554
2018	0.31760005
2019	1.30560202
2020	3.95138303
2021	8.0110102