Year	current US$
2000	0.19691241
2001	0.49061773
2002	0.5691371
2003	2.26525119
2004	2.10129076
2005	2.58821261
2006	2.44310618
2007	1.57768251
2008	1.40314005
2009	3.90248264
2010	2.78645897
2011	2.65441284
2012	1.98248857
2013	1.53454284
2014	0.92551409
2015	0.7315293
2016	0.64963286
2017	0.81525879
2018	0.72258488
2019	0.71785754
2020	0.84377071
2021	0.99979761