Year National Currency 2006-01-01 2136000000 2007-01-01 3751000000 2008-01-01 6363000000 2009-01-01 5423000000 2010-01-01 4567000000 2011-01-01 4948000000 2012-01-01 5500000000 2013-01-01 6327000000 2014-01-01 6183000000 2015-01-01 6024000000 2016-01-01 6980000000