Year current US$ 2006 730000.019073486 2007 230000.004172325 2008 159999.99642372102 2009 280000.001192093 2010 389999.98569488496 2011 90000.0035762787 2012 930000.007152557 2013 889999.985694885 2014 70000.0002980232 2015 399401.009082794 2016 222792.55092144 2017 257468.163967133