Quarter	Percent
1999-01-01	12.22167290981350
1999-04-01	10.76831096855010
1999-07-01	10.41633479202000
1999-10-01	10.57313735048180
2000-01-01	10.38489198554200
2000-04-01	9.47776882541976
2000-07-01	9.22507205662374
2000-10-01	9.33999435814838
2001-01-01	7.91481187314136
2001-04-01	7.34565078203604
2001-07-01	7.28836086472998
2001-10-01	7.62365794953620
2002-01-01	8.36378581703492
2002-04-01	7.85781352419083
2002-07-01	8.32772676039109
2002-10-01	8.64327740248420
2003-01-01	8.75914304263146
2003-04-01	8.27344915704804
2003-07-01	8.38799342384028
2003-10-01	8.57679201089116
2004-01-01	8.68363439642274
2004-04-01	8.32717996912130
2004-07-01	8.20278485001783
2004-10-01	7.83194249359663
2005-01-01	7.84392335258791
2005-04-01	7.41037663273652
2005-07-01	6.55972339484582
2005-10-01	6.72776738922819
2006-01-01	6.85620067553506
2006-04-01	6.38086377046703
2006-07-01	6.04650063796607
2006-10-01	6.12194967957824
2007-01-01	6.34121435865211
2007-04-01	6.15500516476774
2007-07-01	6.24908565928778
2007-10-01	6.89007010245744
2008-01-01	7.89840851246512
2008-04-01	9.06171524237120
2008-07-01	10.28683121960090
2008-10-01	12.95970109420870
2009-01-01	16.84494018554690
2009-04-01	17.56341217146530
2009-07-01	17.62506059696670
2009-10-01	18.55557099408700
2010-01-01	19.79611410185010
2010-04-01	19.55900430239700
2010-07-01	19.11795250513490
2010-10-01	19.79664329589870
2011-01-01	20.59851888768620
2011-04-01	20.41840418248580
2011-07-01	20.90045115579600
2011-10-01	22.25969777223870
2012-01-01	23.95884024300270
2012-04-01	24.43382651944070
2012-07-01	24.53842783827760
2012-10-01	25.39592178815120
2013-01-01	26.66116253592240
2013-04-01	25.49889843226160
2013-07-01	25.19449049866090
2013-10-01	25.03946647765710
2014-01-01	25.37513943055340
2014-04-01	23.69799243526330
2014-07-01	22.52949763293090
2014-10-01	22.80487804878050
2015-01-01	22.74151139388430
2015-04-01	20.95968388408000
2015-07-01	19.90077132890340
2015-10-01	19.48918038674710
2016-01-01	19.45146540371200
2016-04-01	18.40811082834860
2016-07-01	17.39407454603380
2016-10-01	17.21966975975800
2017-01-01	17.22203458246490
2017-04-01	15.63869948923780
2017-07-01	14.80394401203480
2017-10-01	14.97228572838370
2018-01-01	15.18128134072310
2018-04-01	13.71801806231660
2018-07-01	13.11603650586700