Quarter	Persons
1998-04-01	31283500
1999-04-01	31292700
2000-04-01	31407900
2001-04-01	31524000
2002-04-01	31604400
2003-04-01	31647600
2004-04-01	31750700
2005-01-01	31759500
2005-04-01	31800200
2005-07-01	31912700
2005-10-01	31951000
2006-01-01	31872100
2006-04-01	31862800
2006-07-01	31891600
2006-10-01	31964800
2007-01-01	31770300
2007-04-01	31828000
2007-07-01	31969900
2007-10-01	31893100
2008-01-01	31769900
2008-04-01	31803100
2008-07-01	31873600
2008-10-01	31834400
2009-01-01	31740800
2009-04-01	31752600
2009-07-01	31618500
2009-10-01	31652000
2010-01-01	30748200
2010-04-01	30700300
2010-07-01	30720800
2010-10-01	30681800
2011-01-01	30434100
2011-04-01	30438100
2011-07-01	30492900
2011-10-01	30518500
2012-01-01	30534000
2012-04-01	30492000
2012-07-01	30544400
2012-10-01	30576100
2013-01-01	30518800
2013-04-01	30556800
2013-07-01	30536600
2013-10-01	30606800
2014-01-01	30555400
2014-04-01	30610600
2014-07-01	30586100
2014-10-01	30675500
2015-01-01	30724500
2015-04-01	30696300
2015-07-01	30709000
2015-10-01	30858800
2016-01-01	31206200
2016-04-01	31137500
2016-07-01	31194700
2016-10-01	31187600
2017-01-01	31247500
2017-04-01	31142000
2017-07-01	31459500
2017-10-01	31160700
2018-01-01	31240000
2018-04-01	31114400