Year	current US$
2000	0.11220824
2001	0.22249957
2002	0.69546362
2003	1.00171388
2004	0.58279676
2005	0.92028297
2006	0.85292102
2007	1.11558703
2008	1.90131836
2009	1.41374541
2010	1.34684978
2011	2.22021807
2012	1.36307499
2013	2.16983795
2014	2.73050649
2015	1.66784952
2016	2.35607014
2017	2.37663545
2018	2.86975036
2019	2.72132043
2020	2.40909992
2021	4.44900452