Year Persons 2005-01-01 16916000 2006-01-01 15849000 2007-01-01 14730000 2008-01-01 15357000 2009-01-01 19778000 2010-01-01 20762000 2011-01-01 20679000 2012-01-01 21250000 2013-01-01 21185000 2014-01-01 20121000 2015-01-01 18685000 2016-01-01 17776000