Quarter	Persons
1998-04-01	25900
1999-04-01	23300
2000-04-01	23500
2001-04-01	23400
2002-04-01	22000
2003-01-01	20800
2003-04-01	21300
2003-07-01	21700
2003-10-01	21100
2004-01-01	21500
2004-04-01	22200
2004-07-01	21400
2004-10-01	20700
2005-01-01	19300
2005-04-01	22500
2005-07-01	21700
2005-10-01	19600
2006-01-01	18700
2006-04-01	21500
2006-07-01	20000
2006-10-01	19600
2007-01-01	18200
2007-04-01	18600
2007-07-01	20500
2007-10-01	19000
2008-01-01	17600
2008-04-01	19900
2008-07-01	19200
2008-10-01	17900
2009-01-01	17600
2009-04-01	18400
2009-07-01	19500
2009-10-01	17800
2010-01-01	15800
2010-04-01	18100
2010-07-01	18200
2010-10-01	18700
2011-01-01	16500
2011-04-01	17600
2011-07-01	20000
2011-10-01	20300
2012-01-01	18800
2012-04-01	19600
2012-07-01	19500
2012-10-01	19500
2013-01-01	18500
2013-04-01	19400
2013-07-01	20900
2013-10-01	20100
2014-01-01	19600
2014-04-01	19200
2014-07-01	20300
2014-10-01	19600
2015-01-01	18200
2015-04-01	19300
2015-07-01	19100
2015-10-01	18700
2016-01-01	18500
2016-04-01	18500
2016-07-01	19900
2016-10-01	19700
2017-01-01	18400
2017-04-01	17900
2017-07-01	20100
2017-10-01	18700
2018-01-01	18300
2018-04-01	18600