Year National Currency 2008-01-01 3311600 2009-01-01 4044100 2010-01-01 5159800 2011-01-01 7258700 2012-01-01 7544200 2013-01-01 8029000 2014-01-01 9273000 2015-01-01 15563000 2016-01-01 20173900 2017-01-01 22000000