Year	current international $
2000	65.5494419316986
2001	70.7298584005574
2002	68.3819643980911
2003	72.6630434698802
2004	61.3660652772343
2005	55.0731215021926
2006	55.8448301003718
2007	55.3159389031626
2008	58.1195775113611
2009	48.1592192266065
2010	45.2690809516616
2011	36.8142746998109
2012	40.4444151595343
2013	33.67344034551
2014	26.6244080275057
2015	10.4157515156895