Quarter	Percent
1999-07-01	36.3312506673814
1999-10-01	36.0930522365442
2000-01-01	38.1652926028267
2000-04-01	36.3339911095106
2000-07-01	36.9294499361873
2000-10-01	36.5190105976774
2001-01-01	38.5924896809756
2001-04-01	38.0665266634070
2001-07-01	38.6198989994301
2001-10-01	38.5776494872584
2002-01-01	40.7443791231852
2002-04-01	39.4501434666618
2002-07-01	39.2128902476970
2002-10-01	38.2386787458654
2003-01-01	40.6022533306256
2003-04-01	38.9990141788980
2003-07-01	40.0303429252091
2003-10-01	38.6964015131475
2004-01-01	40.7309237472126
2004-04-01	40.0633269658890
2004-07-01	40.5043206654717
2004-10-01	39.3273358952841
2005-01-01	40.4955169856438
2005-04-01	39.6024868765406
2005-07-01	39.5001290273035
2005-10-01	37.2410941126442
2006-01-01	37.6219236904544
2006-04-01	36.2044093869507
2006-07-01	35.8283735698438
2006-10-01	33.9815283999554
2007-01-01	34.7521340752077
2007-04-01	33.1077355913294
2007-07-01	33.1180599706407
2007-10-01	31.6639561100708
2008-01-01	32.4387667119591
2008-04-01	31.9981071390952
2008-07-01	30.9126186596150
2008-10-01	28.5664612471008
2009-01-01	29.3962069820397
2009-04-01	29.9755811307504
2009-07-01	30.5358828781212
2009-10-01	28.5516500907047
2010-01-01	30.7287104379967
2010-04-01	30.6683397861100
2010-07-01	30.5482436077397
2010-10-01	28.6095485287558
2011-01-01	30.3090794827386
2011-04-01	29.5800891746366
2011-07-01	30.3293450584197
2011-10-01	28.9146868884199
2012-01-01	30.3307243510547
2012-04-01	31.6372294408601
2012-07-01	31.1764214237057
2012-10-01	29.7870629366884
2013-01-01	30.4227752966425
2013-04-01	30.2868872192707
2013-07-01	30.6125408073122
2013-10-01	30.0487765075053
2014-01-01	31.9357869699472
2014-04-01	32.1052130517666
2014-07-01	33.1853791912724
2014-10-01	31.9669947545409
2015-01-01	33.4500600330254
2015-04-01	34.0663151274010
2015-07-01	34.3111957658744
2015-10-01	33.3312803654143
2016-01-01	34.4550465066602
2016-04-01	34.3791028914023
2016-07-01	34.8456869644610
2016-10-01	33.4193382920841
2017-01-01	34.6109650508004
2017-04-01	35.1701840080678
2017-07-01	34.6476046031788
2017-10-01	32.5636228380340
2018-01-01	34.0193850076920
2018-04-01	34.0519523733730
2018-07-01	34.1066246532388