Quarter	Percent, Seasonally Adjusted
1999-01-01	53.1014942435345
1999-04-01	53.4782895565801
1999-07-01	53.0354437603088
1999-10-01	53.3347571047814
2000-01-01	53.2554453138521
2000-04-01	53.2645042130394
2000-07-01	54.4184955002699
2000-10-01	54.1585716401285
2001-01-01	54.5684501141741
2001-04-01	54.1734417548526
2001-07-01	54.8809242404794
2001-10-01	54.1146755469643
2002-01-01	55.0708059731077
2002-04-01	54.4581884258808
2002-07-01	53.1303339389638
2002-10-01	52.6053799126418
2003-01-01	52.8590106849915
2003-04-01	52.6095149319668
2003-07-01	51.9168416907896
2003-10-01	53.6750732024576
2004-01-01	54.6995368502806
2004-04-01	55.2138815906082
2004-07-01	55.9893262063591
2004-10-01	55.0868077929730
2005-01-01	55.3554651937476
2005-04-01	55.1113313388792
2005-07-01	55.3502553110060
2005-10-01	55.7534405807556
2006-01-01	55.8048965942159
2006-04-01	56.1382920013228
2006-07-01	55.6490016156832
2006-10-01	55.4830913858599
2007-01-01	56.1499989723459
2007-04-01	57.2853242421608
2007-07-01	57.1691551031702
2007-10-01	56.6753868794090
2008-01-01	56.4286819069017
2008-04-01	56.6301838135936
2008-07-01	57.4952034462187
2008-10-01	56.9976439899523
2009-01-01	55.7663249923363
2009-04-01	55.9667376649094
2009-07-01	56.1504871772331
2009-10-01	55.9323754203971
2010-01-01	55.5975441998557
2010-04-01	54.8707033275167
2010-07-01	54.3189675309213
2010-10-01	54.7778287315864
2011-01-01	53.5705213471186
2011-04-01	53.1387222797140
2011-07-01	52.9840845909520
2011-10-01	53.0829807359369
2012-01-01	53.4310123650014
2012-04-01	52.0871322466312
2012-07-01	51.9107111467773
2012-10-01	52.3974647753128
2013-01-01	51.2784523524087
2013-04-01	51.1757140353940
2013-07-01	51.7426147025455
2013-10-01	51.6606078344911
2014-01-01	51.8145238073164
2014-04-01	52.7017793028677
2014-07-01	51.9420059972238
2014-10-01	51.9330154544843
2015-01-01	51.8607839702083
2015-04-01	52.3756604263711
2015-07-01	52.5049395943872
2015-10-01	51.9809748660933
2016-01-01	51.6883219766144
2016-04-01	52.1331226879732
2016-07-01	51.8582725805554
2016-10-01	52.5981994807992
2017-01-01	54.0355896695274
2017-04-01	54.1622091407031
2017-07-01	54.7970285633298
2017-10-01	55.3629113882583
2018-01-01	55.6727561733195
2018-04-01	55.8248572116401