Quarter	Percent, Seasonally Adjusted
1999-01-01	63.8390926992516
1999-04-01	64.8189063162196
1999-07-01	64.1351324269907
1999-10-01	64.4432244914622
2000-01-01	63.6529564685284
2000-04-01	63.8509344601274
2000-07-01	64.8188031454331
2000-10-01	64.4305073072076
2001-01-01	64.9485655664530
2001-04-01	64.6936687710810
2001-07-01	65.2270306223628
2001-10-01	64.5166807036128
2002-01-01	65.9993373066469
2002-04-01	64.7516513348637
2002-07-01	62.9457767305537
2002-10-01	62.8361563168214
2003-01-01	63.4958283160072
2003-04-01	63.1726753523052
2003-07-01	62.6027418620663
2003-10-01	64.5573096028074
2004-01-01	65.4639913476689
2004-04-01	65.5473937898090
2004-07-01	66.4483524840482
2004-10-01	65.9495219454920
2005-01-01	65.9001747440416
2005-04-01	65.3712406075346
2005-07-01	66.0284966800885
2005-10-01	66.6347541247639
2006-01-01	65.9072306037884
2006-04-01	65.7810502052326
2006-07-01	65.7461771986211
2006-10-01	65.2192797955650
2007-01-01	65.9244334982572
2007-04-01	66.7866972600309
2007-07-01	66.6419321500336
2007-10-01	66.1518611151687
2008-01-01	65.5947998909551
2008-04-01	65.4158586637071
2008-07-01	66.3135342599836
2008-10-01	65.1945421197620
2009-01-01	64.2591831092091
2009-04-01	65.5962562530008
2009-07-01	66.0579611608130
2009-10-01	65.9165274414635
2010-01-01	65.7562337687915
2010-04-01	65.0230114960830
2010-07-01	64.8863221581459
2010-10-01	65.4426779001757
2011-01-01	64.3251869443952
2011-04-01	63.7276201439809
2011-07-01	63.4657008892996
2011-10-01	63.3313259537530
2012-01-01	63.1026111146558
2012-04-01	62.4974144648116
2012-07-01	62.8557192330465
2012-10-01	63.7071799588667
2013-01-01	63.2536166395314
2013-04-01	63.1225694333251
2013-07-01	62.9097228392941
2013-10-01	63.0359113198791
2014-01-01	63.0732650961079
2014-04-01	63.5086505112712
2014-07-01	63.0976422250957
2014-10-01	63.5170196419238
2015-01-01	63.1456334948532
2015-04-01	63.3154378981790
2015-07-01	63.2036979784505
2015-10-01	61.9860770266329
2016-01-01	61.3229868316321
2016-04-01	61.3797404695916
2016-07-01	60.9302753033467
2016-10-01	61.6627820792950
2017-01-01	63.0669466368607
2017-04-01	63.1756747312399
2017-07-01	63.2631821945042
2017-10-01	63.1829973695155
2018-01-01	63.7614968231072
2018-04-01	64.4589324464638