Year National Currency 2004-01-01 6121000000 2005-01-01 7642472300 2006-01-01 9364368700 2007-01-01 10554510400 2008-01-01 13035296200 2009-01-01 13019529400 2010-01-01 16192830800 2011-01-01 19706841900 2012-01-01 23038000000