Quarter	Percent
1999-01-01	14.22337299624710
1999-04-01	12.57213401854670
1999-07-01	12.19098263279970
1999-10-01	12.62561195568150
2000-01-01	12.09695992630120
2000-04-01	10.19149535342160
2000-07-01	9.68796685176311
2000-10-01	9.51396664082910
2001-01-01	9.37399772574861
2001-04-01	8.17386786734782
2001-07-01	8.41638029782360
2001-10-01	8.43331594505303
2002-01-01	7.91206274689414
2002-04-01	7.38717204484662
2002-07-01	7.01303777324884
2002-10-01	8.09078847076758
2003-01-01	8.72993201165514
2003-04-01	7.75125841298569
2003-07-01	8.04774417174484
2003-10-01	7.51073563670044
2004-01-01	8.76348500722032
2004-04-01	6.67746077829267
2004-07-01	6.73130040879461
2004-10-01	8.01819653372778
2005-01-01	7.62429126344491
2005-04-01	6.81629629750613
2005-07-01	7.01241936668845
2005-10-01	6.63072701236924
2006-01-01	7.49658286083427
2006-04-01	6.88248507586815
2006-07-01	6.42626732094811
2006-10-01	6.48203319456124
2007-01-01	6.39799449576283
2007-04-01	5.88775455085616
2007-07-01	5.44997728062438
2007-10-01	5.32560334366995
2008-01-01	6.88919288645691
2008-04-01	5.27307474899734
2008-07-01	5.69339949842591
2008-10-01	6.43284305802489
2009-01-01	8.63542347049859
2009-04-01	7.87319142082517
2009-07-01	7.42013694615405
2009-10-01	7.58251561106155
2010-01-01	8.02121403643758
2010-04-01	6.88198825026396
2010-07-01	6.38383297644540
2010-10-01	6.52906945124273
2011-01-01	6.58640520481807
2011-04-01	5.97235092072448
2011-07-01	5.75813576105818
2011-10-01	5.85105162646972
2012-01-01	5.74920002552325
2012-04-01	5.02290583863380
2012-07-01	4.75267204702559
2012-10-01	4.84272384734150
2013-01-01	5.41258990282314
2013-04-01	5.02413740377524
2013-07-01	4.78741442435959
2013-10-01	5.38191494365566
2014-01-01	5.00675188930509
2014-04-01	4.63813785838866
2014-07-01	4.59506133754913
2014-10-01	5.00994676242187
2015-01-01	5.33326537343226
2015-04-01	5.33777439501776
2015-07-01	5.09289083438087
2015-10-01	5.42306830388614
2016-01-01	5.52841546544635
2016-04-01	5.43260866433475
2016-07-01	5.02807762247154
2016-10-01	5.26896501857034
2017-01-01	5.38909719308077
2017-04-01	5.05992075173545
2017-07-01	4.90323037089357
2017-10-01	4.86540833282919
2018-01-01	4.89341101593269
2018-04-01	4.71919656580090
2018-07-01	4.52665386957601