Year National Currency 2004-01-01 3973623100 2005-01-01 5841591700 2006-01-01 7731696000 2007-01-01 8932558900 2008-01-01 9673160400 2009-01-01 14235663200 2010-01-01 18819900600 2011-01-01 19863870600 2012-01-01 20015465300 2013-01-01 19588795700 2014-01-01 19650208000 2015-01-01 18856169300 2016-01-01 20850586300