Year	current US$
2000	0.3052901023540009
2001	0.38007945668373927
2002	0.4089713214317347
2003	0.6866362653646504
2004	1.2562694405717159
2005	1.6020223690691007
2006	1.1865640819798207
2007	1.441370995424572
2008	1.5208317960750048
2009	1.6240284927050839
2010	1.899262252440405
2011	2.07608472522825
2012	1.8212173769060223
2013	1.6760196630473345
2014	1.1735655169554988
2015	0.8196298283408784
2016	0.661199762477972
2017	0.6856159955709128
2018	0.6175646559034141
2019	0.6764582054453063
2020	0.5802163677921671
2021	1.2795012083212216