Year current US$ 2006 19999.9995529652 2007 119999.997317791 2008 90000.0035762787 2009 19999.9995529652 2010 59999.9986588955 2011 70000.0002980232 2012 9996.49986624718 2013 14527.5304093957 2015 3971.0002020001402 2016 2582.00010284781 2017 24000.000208616297