Year	current US$
2000	0.47256437697984455
2001	0.5034778728114516
2002	0.5690461426232599
2003	0.8132793607964839
2004	1.4659598937367846
2005	1.4533394387105438
2006	1.4446939175362719
2007	1.8727688720750437
2008	1.981539852333314
2009	1.8836226059528245
2010	2.1348613549194333
2011	2.4335062876197173
2012	2.3793062621614713
2013	2.633256942777737
2014	2.4952016926044047
2015	2.0002476219748835
2016	1.917935700205894
2017	1.8112822011810936
2018	1.7956245467615488
2019	2.0402527956552716
2020	1.8537195053323652
2021	3.512756093595258