Year National Currency 2004-01-01 537000000 2005-01-01 741000000 2006-01-01 1002000000 2007-01-01 1770000000 2008-01-01 1575000000 2009-01-01 1715000000 2010-01-01 1900000000 2011-01-01 2016000000 2012-01-01 2195000000 2013-01-01 2503000000 2014-01-01 2777000000 2015-01-01 2876000000 2016-01-01 3131000000 2017-01-01 3504000000