Quarter	Percent, Seasonally Adjusted
1998-04-01	2.93704108733010
1999-04-01	2.25062086092715
2000-04-01	1.76012461059190
2001-04-01	1.09475858507617
2002-04-01	2.10259854316268
2003-04-01	3.11415152133960
2004-04-01	3.32060096765979
2005-04-01	3.19739320808513
2006-04-01	2.68123640410786
2007-04-01	2.30045311955385
2008-04-01	2.22418185381148
2009-04-01	3.14567948594994
2010-01-01	4.35057797595605
2010-04-01	3.96984936636158
2010-07-01	3.80380371499447
2010-10-01	3.75526017998743
2011-01-01	3.48456923889667
2011-04-01	3.55036510445890
2011-07-01	3.35461175908491
2011-10-01	3.77643907432524
2012-01-01	3.43851051093953
2012-04-01	3.46879363123859
2012-07-01	3.69288238701668
2012-10-01	3.83203412040506
2013-01-01	3.86407009911695
2013-04-01	4.10676215300198
2013-07-01	4.17358754893165
2013-10-01	3.76434610119957
2014-01-01	4.05588292218306
2014-04-01	4.25942366802664
2014-07-01	4.22075839664810
2014-10-01	3.88443407303299
2015-01-01	3.98944950210147
2015-04-01	4.02410918918269
2015-07-01	4.17781288426756
2015-10-01	4.06691222099432
2016-01-01	4.22801754148081
2016-04-01	4.46015323470935
2016-07-01	4.29260350672692
2016-10-01	4.18804062994836
2017-01-01	4.30986163459960
2017-04-01	3.88267805799798
2017-07-01	3.93780901609640
2017-10-01	4.13156473595861
2018-01-01	4.03433369739460
2018-04-01	3.94786750086877