Year National Currency 2008-01-01 31889000000 2009-01-01 33122000000 2010-01-01 31246000000 2011-01-01 32303000000 2012-01-01 31875000000 2013-01-01 30501000000 2014-01-01 26764000000 2015-01-01 26821000000 2016-01-01 23743000000