Quarter	Percent
1999-07-01	24.9065695688507
1999-10-01	24.3737986692771
2000-01-01	25.8797286086920
2000-04-01	24.3827341276457
2000-07-01	24.5141579666711
2000-10-01	24.2411447445946
2001-01-01	25.8833064887603
2001-04-01	24.0087182099614
2001-07-01	24.5819828167313
2001-10-01	24.1889635971307
2002-01-01	25.2584047502887
2002-04-01	23.6590334830288
2002-07-01	24.1754768086025
2002-10-01	24.0493434788476
2003-01-01	25.2173358385624
2003-04-01	23.9736951411786
2003-07-01	24.6447162194482
2003-10-01	24.2563817637660
2004-01-01	24.5480409776029
2004-04-01	23.5166478997761
2004-07-01	24.1713264433368
2004-10-01	23.8344417593121
2005-01-01	24.7171646034356
2005-04-01	23.5113428700822
2005-07-01	24.0509034407619
2005-10-01	23.4758909243548
2006-01-01	24.2741792165978
2006-04-01	23.0711196538368
2006-07-01	23.5886099448067
2006-10-01	23.4167874121498
2007-01-01	24.3084683384854
2007-04-01	23.0021197817889
2007-07-01	23.5896731925891
2007-10-01	23.1788318069349
2008-01-01	24.1328004954173
2008-04-01	22.8810600209049
2008-07-01	23.4916659616126
2008-10-01	23.1595357662710
2009-01-01	24.5431074961466
2009-04-01	23.4469355939944
2009-07-01	24.2044318482610
2009-10-01	23.9342050531942
2010-01-01	24.3492996025455
2010-04-01	23.1051938830420
2010-07-01	23.4404456469775
2010-10-01	23.3731806907577
2011-01-01	23.9275178458380
2011-04-01	22.4249489745649
2011-07-01	23.2724748977298
2011-10-01	23.0124833072556
2012-01-01	23.6325455114107
2012-04-01	22.4177902640284
2012-07-01	22.8894347586566
2012-10-01	23.0444001568894
2013-01-01	23.7925132137273
2013-04-01	22.3202204944683
2013-07-01	22.4395577244688
2013-10-01	22.2281718056924
2014-01-01	22.3609028770192
2014-04-01	21.2764088438844
2014-07-01	21.5457303745709
2014-10-01	21.5198188704492
2015-01-01	22.0732758165459
2015-04-01	21.1542117680485
2015-07-01	21.3367495214743
2015-10-01	21.2995584835745
2016-01-01	21.5687163458271
2016-04-01	21.0057712325185
2016-07-01	21.0082753656036
2016-10-01	21.0953591762101
2017-01-01	21.2415579820893
2017-04-01	20.5999944186301
2017-07-01	20.8324535947142
2017-10-01	20.8838665212377
2018-01-01	21.1004774281002
2018-04-01	20.2631098834582
2018-07-01	20.6373090910922