Year	current US$
2000	44.70202772
2001	51.33013556
2002	50.3972631
2003	58.46818741
2004	66.37611704
2005	70.19423488
2006	80.39788361
2007	105.92313184
2008	149.64161734
2009	148.10162638
2010	159.85345752
2011	203.59943232
2012	245.53361202
2013	236.70454134
2014	260.06503695
2015	205.74577811
2016	176.69880873
2017	177.45868836
2018	178.40678882
2019	148.40524126
2020	125.66628926
2021	120.91857909