Year National Currency 2008-01-01 8497000000 2009-01-01 17208000000 2010-01-01 18677000000 2011-01-01 21482000000 2012-01-01 22417794700 2013-01-01 23811828700 2014-01-01 23486787400 2015-01-01 29184000000 2016-01-01 30972000000