Year National Currency 2006-01-01 31019000000 2007-01-01 59436000000 2008-01-01 23848000000 2009-01-01 25134000000 2010-01-01 25391000000 2011-01-01 24828000000 2012-01-01 27638000000 2013-01-01 28656000000 2014-01-01 29068000000 2015-01-01 31371000000 2016-01-01 36996000000