Year Persons 2005-01-01 19874000 2006-01-01 19776000 2007-01-01 19763000 2008-01-01 20038000 2009-01-01 21098000 2010-01-01 21436000 2011-01-01 21763000 2012-01-01 21715000 2013-01-01 22139000 2014-01-01 22343000 2015-01-01 22329000 2016-01-01 22190000