Quarter	Percent, Seasonally Adjusted
1998-04-01	3.31812232480809
1999-04-01	2.67609638211671
2000-04-01	2.25154727182187
2001-04-01	2.06145468689226
2002-04-01	2.65567125585296
2003-04-01	3.66508578602316
2004-04-01	3.98111832286280
2005-04-01	3.84960331148672
2006-04-01	3.52985742819753
2007-04-01	3.15384353393958
2008-04-01	2.86923487070115
2009-04-01	3.67531446540880
2010-01-01	4.69495980282884
2010-04-01	4.63414012781371
2010-07-01	4.59133864433350
2010-10-01	4.24353123591656
2011-01-01	4.10354725909405
2011-04-01	3.83350925582389
2011-07-01	4.25480023132296
2011-10-01	4.08958413126804
2012-01-01	3.96472989525041
2012-04-01	4.07250592570686
2012-07-01	4.12736932419286
2012-10-01	4.31524445506761
2013-01-01	4.61548327107174
2013-04-01	4.40577343623837
2013-07-01	4.44921098439964
2013-10-01	4.36513104682091
2014-01-01	4.84572568385910
2014-04-01	4.55759952867513
2014-07-01	4.57934821015679
2014-10-01	4.52655468472210
2015-01-01	4.18844204532014
2015-04-01	4.42356126219591
2015-07-01	4.46569210746561
2015-10-01	4.40402340127583
2016-01-01	4.97585315295298
2016-04-01	4.69129706777108
2016-07-01	4.63359396470641
2016-10-01	4.59230614658364
2017-01-01	4.95627031292956
2017-04-01	4.50110590436221
2017-07-01	4.58321961529526
2017-10-01	4.56049659740508
2018-01-01	4.68170452813604
2018-04-01	4.89784066523685