Quarter	Thousands of Persons, Seasonally Adjusted
1998-04-01	4470
1999-04-01	4495.100
2000-01-01	4567.637
2000-04-01	4587.136
2000-07-01	4612.782
2000-10-01	4641.309
2001-01-01	4654.055
2001-04-01	4649.627
2001-07-01	4650.741
2001-10-01	4676.312
2002-01-01	4679.650
2002-04-01	4723.646
2002-07-01	4720.046
2002-10-01	4711.252
2003-01-01	4696.139
2003-04-01	4700.351
2003-07-01	4707.192
2003-10-01	4702.007
2004-01-01	4721.456
2004-04-01	4718.441
2004-07-01	4717.337
2004-10-01	4713.934
2005-01-01	4692.698
2005-04-01	4696.809
2005-07-01	4688.085
2005-10-01	4687.571
2006-01-01	4702.425
2006-04-01	4706.433
2006-07-01	4724.297
2006-10-01	4741.543
2007-01-01	4755.017
2007-04-01	4765.926
2007-07-01	4778.749
2007-10-01	4757.263
2008-01-01	4777.455
2008-04-01	4805.788
2008-07-01	4786.275
2008-10-01	4818.768
2009-01-01	4830.748
2009-04-01	4818.746
2009-07-01	4799.739
2009-10-01	4790.775
2010-01-01	4750.933
2010-04-01	4743.455
2010-07-01	4733.172
2010-10-01	4707.457
2011-01-01	4702.796
2011-04-01	4685.902
2011-07-01	4713.261
2011-10-01	4734.061