Year National Currency 2004-01-01 3973623100 2005-01-01 5841591700 2006-01-01 7731696000 2007-01-01 8932558900 2008-01-01 9673160400 2009-01-01 14235663200 2010-01-01 18592047400 2011-01-01 19599823200 2012-01-01 19727941800 2013-01-01 19309327700 2014-01-01 19361367500 2015-01-01 18387022900 2016-01-01 19686279900