Year National Currency 2004-01-01 6834063000 2005-01-01 8284285900 2006-01-01 10005484900 2007-01-01 11903112000 2008-01-01 14734427400 2009-01-01 17136156600 2010-01-01 18453054400 2011-01-01 21937604700 2012-01-01 25722030700