Quarter	Percent
1999-07-01	32.5113033479141
1999-10-01	32.1540097408974
2000-01-01	33.6314985147805
2000-04-01	33.3243151892447
2000-07-01	33.9737874736907
2000-10-01	33.6163590451287
2001-01-01	34.4757046816630
2001-04-01	34.7669958985131
2001-07-01	35.7239455294503
2001-10-01	35.4991891100651
2002-01-01	36.8157760938970
2002-04-01	36.7165873577946
2002-07-01	36.6090310073219
2002-10-01	35.8261590795108
2003-01-01	36.5122516770813
2003-04-01	35.8073610201217
2003-07-01	36.7734372794942
2003-10-01	35.0779552569406
2004-01-01	36.0275519357169
2004-04-01	36.1666274585460
2004-07-01	37.3235633524043
2004-10-01	36.0989884621130
2005-01-01	36.1387366568120
2005-04-01	36.0937936866458
2005-07-01	36.4557196950563
2005-10-01	34.1636704872797
2006-01-01	34.0032220624166
2006-04-01	33.1470198664566
2006-07-01	32.5501506760142
2006-10-01	31.1657577400329
2007-01-01	31.9385629685250
2007-04-01	30.6937286691143
2007-07-01	30.9462261858509
2007-10-01	29.5759443338150
2008-01-01	29.7957719520547
2008-04-01	29.2431597185892
2008-07-01	28.6774188402938
2008-10-01	26.3860043035080
2009-01-01	26.7526241948728
2009-04-01	27.5169511223710
2009-07-01	27.9553528084913
2009-10-01	26.1068225653452
2010-01-01	27.2597759138645
2010-04-01	28.0378185289219
2010-07-01	28.1951518413180
2010-10-01	26.3273795741364
2011-01-01	27.2947356900716
2011-04-01	27.3093313510121
2011-07-01	28.1210801421569
2011-10-01	26.7324748134338
2012-01-01	27.1367166334581
2012-04-01	28.7222151900614
2012-07-01	28.8627665704790
2012-10-01	27.7153589690483
2013-01-01	27.3168088965619
2013-04-01	27.4167511316404
2013-07-01	28.1358722578268
2013-10-01	27.5298986675825
2014-01-01	28.4784322045522
2014-04-01	29.0497665913946
2014-07-01	30.6401162262602
2014-10-01	29.1350669919787
2015-01-01	29.5330685149874
2015-04-01	30.4576837785516
2015-07-01	31.3022835323984
2015-10-01	30.4091301316214
2016-01-01	30.2132560571776
2016-04-01	30.5228319227305
2016-07-01	31.4698659244706
2016-10-01	30.5554228929545
2017-01-01	30.5092217388972
2017-04-01	31.3950258435375
2017-07-01	31.7218827941958
2017-10-01	30.0949834899643
2018-01-01	30.2126805551025
2018-04-01	30.3201201886521
2018-07-01	30.6148347219858