Year	current US$
2000	0.45394961
2001	0.68695396
2002	0.26231183
2003	0.32201298
2004	0.50488696
2005	0.55931852
2006	0.60922019
2007	0.93606624
2008	0.70019947
2009	1.014309
2010	0.73881941
2011	1.03010649
2012	1.02727262
2013	1.18270207
2014	2.09160497
2015	0.47620777
2016	0.56710613
2017	0.76520725
2018	0.45321908
2019	0.67617367
2020	0.66905389
2021	3.28322876