Quarter	Percent
1999-07-01	32.8799953573953
1999-10-01	32.2993214701253
2000-01-01	33.8438743011340
2000-04-01	32.1587713830909
2000-07-01	33.1891962331844
2000-10-01	32.6972551578883
2001-01-01	33.8815544945842
2001-04-01	33.3149623721576
2001-07-01	33.8341852182756
2001-10-01	33.4309452548672
2002-01-01	35.6117490458748
2002-04-01	34.4098173797790
2002-07-01	34.4803809239648
2002-10-01	33.4827955054342
2003-01-01	34.9731949482201
2003-04-01	33.5957409495612
2003-07-01	34.9255254931947
2003-10-01	34.4858084820520
2004-01-01	35.7667290084020
2004-04-01	34.7477161595744
2004-07-01	35.1718613617478
2004-10-01	34.9046115925621
2005-01-01	35.2200872632316
2005-04-01	34.0565601817135
2005-07-01	34.2212924791543
2005-10-01	32.1994743278756
2006-01-01	32.7076377961661
2006-04-01	31.2300651170133
2006-07-01	31.1379366814355
2006-10-01	29.3149286439258
2007-01-01	30.0787226246053
2007-04-01	28.5935581706194
2007-07-01	28.8703481479271
2007-10-01	27.3577933645505
2008-01-01	27.2668872837547
2008-04-01	26.8432001551356
2008-07-01	26.3095356224893
2008-10-01	23.9016872749512
2009-01-01	24.3583165977069
2009-04-01	25.1229500738745
2009-07-01	26.0515973517882
2009-10-01	24.1956358603663
2010-01-01	25.4638961937364
2010-04-01	25.1178861447306
2010-07-01	25.5455610594711
2010-10-01	24.3748430576008
2011-01-01	26.0039594349079
2011-04-01	25.3664183962782
2011-07-01	26.1073905922321
2011-10-01	25.2112818537689
2012-01-01	26.4540559416670
2012-04-01	26.8854031050198
2012-07-01	27.0804491282581
2012-10-01	25.5622840325093
2013-01-01	26.1721644296689
2013-04-01	26.0389483027882
2013-07-01	26.9334113188820
2013-10-01	26.4531474014824
2014-01-01	28.4401113242888
2014-04-01	27.8039248232297
2014-07-01	29.4842424373340
2014-10-01	28.0758200078500
2015-01-01	29.8019179978998
2015-04-01	30.1127515082580
2015-07-01	30.2628570696505
2015-10-01	29.3058172594256
2016-01-01	30.1385989000043
2016-04-01	30.3486534648497
2016-07-01	30.8472838398551
2016-10-01	29.2866406069462
2017-01-01	30.2076829987473
2017-04-01	31.2153255957563
2017-07-01	30.8668777741384
2017-10-01	28.8514573461275
2018-01-01	29.8054234219969
2018-04-01	29.1652256212027
2018-07-01	29.5588170821684