Year	current US$
2000	0.67302974
2001	0.8273523
2002	0.93698418
2003	0.99617744
2004	1.11282451
2005	1.09841056
2006	1.00770857
2007	1.16088794
2008	1.33497934
2009	1.70974538
2010	1.90037988
2011	2.00332447
2012	2.18018242
2013	2.46888566
2014	2.52822312
2015	2.61028736
2016	2.4379541
2017	2.55791216
2018	2.60909847
2019	2.65181561
2020	2.7391753
2021	4.42487536