Year	current US$
2000	3.04990895
2001	1.54376298
2002	1.10322976
2003	1.06611363
2004	1.1328998
2005	0.63418438
2006	0.64666163
2007	0.66603716
2008	1.25792331
2009	1.88573543
2010	2.23613193
2011	2.71470827
2012	1.95442876
2013	2.11025965
2014	1.52691502
2015	1.26350221
2016	1.37684709
2017	1.14872726
2018	0.27229036
2019	0.0262286
2020	0.0155991
2021	1.30706087