Year	current US$
2000	0.8648173
2001	0.94692675
2002	0.65916776
2003	0.8178893
2004	1.71819008
2005	1.45830566
2006	2.76035606
2007	3.93147477
2008	6.18278732
2009	5.16081289
2010	5.65086844
2011	5.56719677
2012	5.66920318
2013	4.54626881
2014	5.13294196
2015	4.29761759
2016	4.99243189
2017	8.66631217
2018	8.61945801
2019	8.95723634
2020	9.88554346
2021	7.49517467