Quarter	Percent
1999-07-01	43.0913999408936
1999-10-01	42.2243539599776
2000-01-01	43.9083840857528
2000-04-01	41.8088487046223
2000-07-01	41.7840660995945
2000-10-01	41.2191768030747
2001-01-01	42.9361499406272
2001-04-01	40.7541157668115
2001-07-01	41.6238689298115
2001-10-01	40.9676176054877
2002-01-01	42.1710589368469
2002-04-01	40.0936757824952
2002-07-01	40.7592709698074
2002-10-01	40.6780857744108
2003-01-01	42.7541422073245
2003-04-01	40.9274445913421
2003-07-01	41.6292411584640
2003-10-01	40.9325063876181
2004-01-01	41.0610722882226
2004-04-01	39.5995260874286
2004-07-01	40.3508785825755
2004-10-01	39.8587846844863
2005-01-01	40.9635385892642
2005-04-01	39.3907383041310
2005-07-01	39.5864006865054
2005-10-01	38.4809913619529
2006-01-01	39.3266982816717
2006-04-01	37.9365527658282
2006-07-01	38.4938831089084
2006-10-01	38.0525126881561
2007-01-01	38.9569476117784
2007-04-01	37.5066024705461
2007-07-01	38.1127805279257
2007-10-01	37.3332033471011
2008-01-01	38.5204286728904
2008-04-01	37.1030339629312
2008-07-01	37.8964437859019
2008-10-01	37.2741496041035
2009-01-01	39.0470831524096
2009-04-01	38.0728445889050
2009-07-01	38.5823804324417
2009-10-01	38.1246042225561
2010-01-01	38.7760550962832
2010-04-01	37.4301648376313
2010-07-01	37.6120278358619
2010-10-01	37.4885029019287
2011-01-01	38.1835785283237
2011-04-01	36.2098293439716
2011-07-01	37.5075625344989
2011-10-01	37.1517196943477
2012-01-01	37.8984958894532
2012-04-01	36.4828625499844
2012-07-01	37.0348314867982
2012-10-01	37.2070432263367
2013-01-01	38.0902059293023
2013-04-01	36.2121898809608
2013-07-01	36.1499583867481
2013-10-01	35.9639605855098
2014-01-01	36.1710246313179
2014-04-01	34.7252443045440
2014-07-01	35.1053804019939
2014-10-01	34.9863261244591
2015-01-01	35.4030327124090
2015-04-01	34.3845173696432
2015-07-01	34.4947132104895
2015-10-01	34.2015868544730
2016-01-01	34.6358726564058
2016-04-01	33.9700520149522
2016-07-01	33.9497086027204
2016-10-01	33.6652217661631
2017-01-01	33.7622499963604
2017-04-01	33.1465527185595
2017-07-01	33.3493381290666
2017-10-01	33.1787344979456
2018-01-01	33.3191875209977
2018-04-01	32.2953273957220
2018-07-01	32.4645080843001