Quarter	Percent
1999-07-01	6.19022684467414
1999-10-01	5.20555294472679
2000-01-01	5.53571820764849
2000-04-01	4.30918599836707
2000-07-01	4.11611534985338
2000-10-01	4.19084243525923
2001-01-01	5.37017143724088
2001-04-01	3.97152998720587
2001-07-01	3.69822440898478
2001-10-01	3.55731712456794
2002-01-01	3.91877997238358
2002-04-01	3.37541263509357
2002-07-01	3.16035854658068
2002-10-01	3.28339260363459
2003-01-01	3.54848107386718
2003-04-01	3.33265671237656
2003-07-01	3.40510395220865
2003-10-01	3.46585415566884
2004-01-01	3.64273023558366
2004-04-01	3.32308287861264
2004-07-01	3.58222277564947
2004-10-01	3.69760621410132
2005-01-01	4.10917602918112
2005-04-01	3.55393638183980
2005-07-01	3.65219063277949
2005-10-01	3.54895073264931
2006-01-01	3.88611369340595
2006-04-01	3.62098927672292
2006-07-01	3.55922276001437
2006-10-01	3.51362308408160
2007-01-01	3.93199345096708
2007-04-01	3.64249280717324
2007-07-01	3.38719905470172
2007-10-01	3.29536399893151
2008-01-01	3.60488142725228
2008-04-01	3.40533452384843
2008-07-01	3.36688318812265
2008-10-01	3.51269690627519
2009-01-01	4.29806385637752
2009-04-01	4.21054612267433
2009-07-01	4.13700978560564
2009-10-01	3.71718304975086
2010-01-01	4.35120340398091
2010-04-01	3.75038850239324
2010-07-01	3.68015011026426
2010-10-01	3.50438091971144
2011-01-01	3.92505359596179
2011-04-01	3.40520745926260
2011-07-01	3.10913872435950
2011-10-01	3.02018932005016
2012-01-01	3.56971860934749
2012-04-01	3.29648015049064
2012-07-01	2.92222535965233
2012-10-01	2.90908996517338
2013-01-01	3.46244992917196
2013-04-01	3.17886830724523
2013-07-01	3.11839265018794
2013-10-01	2.87851827943088
2014-01-01	3.37075645298562
2014-04-01	3.44701396655941
2014-07-01	3.20483445071904
2014-10-01	3.11678131103159
2015-01-01	3.40203282645211
2015-04-01	3.50017805310750
2015-07-01	3.25216691545395
2015-10-01	2.99033406242407
2016-01-01	3.85704070271263
2016-04-01	3.64502630119249
2016-07-01	3.53973563616738
2016-10-01	3.07258730714453
2017-01-01	3.84741031557251
2017-04-01	3.89580454494479
2017-07-01	3.55245509312756
2017-10-01	3.29269115795702
2018-01-01	3.69031692001660
2018-04-01	4.13730272521556
2018-07-01	3.89914028639424