Year Persons 2005-01-01 17075000 2006-01-01 15954000 2007-01-01 14785000 2008-01-01 15411000 2009-01-01 19825000 2010-01-01 20854000 2011-01-01 20770000 2012-01-01 21346000 2013-01-01 21272000 2014-01-01 20123000 2015-01-01 18702000 2016-01-01 17788000