Year Persons 2006-01-01 20347425 2007-01-01 20662925 2008-01-01 21081875 2009-01-01 21152750 2010-01-01 22485000 2011-01-01 23981100 2012-01-01 24699850 2013-01-01 25402925 2014-01-01 25821925 2015-01-01 26500075 2016-01-01 27097125 2017-01-01 28082500