Year Persons 2005-01-01 20667000 2006-01-01 20729000 2007-01-01 20850000 2008-01-01 20903000 2009-01-01 21169000 2010-01-01 21558000 2011-01-01 21473000 2012-01-01 21792000 2013-01-01 21577000 2014-01-01 21575000 2015-01-01 21467000 2016-01-01 21223000