Quarter	Percent
1986-01-01	19.5682168655142
1986-04-01	20.5259313367421
1986-07-01	21.1816263593572
1986-10-01	21.0700987534402
1987-01-01	20.6148136194933
1987-04-01	21.6466607588818
1987-07-01	21.8888263212935
1987-10-01	21.8692338547934
1988-01-01	22.7301841473179
1988-04-01	23.8834640627501
1988-07-01	24.8739899191935
1988-10-01	24.0134206742291
1989-01-01	24.1860836259176
1989-04-01	25.2653419519591
1989-07-01	25.9129325466433
1989-10-01	25.2205707018520
1990-01-01	25.4672157111182
1990-04-01	25.6438615895086
1990-07-01	26.2904878240996
1990-10-01	25.2845592275689
1991-01-01	25.5901203689229
1991-04-01	26.2682147588249
1991-07-01	26.5567907953044
1991-10-01	25.9589306470360
1992-01-01	25.8550142824056
1992-04-01	26.8709578072066
1992-07-01	27.5626248655294
1992-10-01	26.7928286852590
1993-01-01	26.6127185281319
1993-04-01	26.8747620860297
1993-07-01	27.6448697501329
1993-10-01	26.0537268255770
1994-01-01	26.2075201567327
1994-04-01	26.5264739016147
1994-07-01	26.7690003743916
1994-10-01	25.7961070922515
1995-01-01	25.6941351150705
1995-04-01	26.3259116798580
1995-07-01	26.3561320754717
1995-10-01	25.0550095349861
1996-01-01	25.1805910251733
1996-04-01	26.0231155048339
1996-07-01	25.7971014492754
1996-10-01	25.0631449808761
1997-01-01	25.4653920793502
1997-04-01	25.8263425826343
1997-07-01	26.1862162742432
1997-10-01	25.2729997858825
1998-01-01	25.5304001139114
1998-04-01	26.5590556780203
1998-07-01	27.1312872975277
1998-10-01	26.4785136860020
1999-01-01	26.0955752212389
1999-04-01	27.0996957475412
1999-07-01	27.1808285027570
1999-10-01	25.8833486141477
2000-01-01	26.0979729729730
2000-04-01	27.1927973552789
2000-07-01	26.8512013488830
2000-10-01	25.6307821698907
2001-01-01	25.9829299006576
2001-04-01	26.8706770069168
2001-07-01	26.6141951661211
2001-10-01	25.2840121917429
2002-01-01	24.5301204819277
2002-04-01	25.9350595972051
2002-07-01	25.9799577339969
2002-10-01	25.4386559176208
2003-01-01	25.6558590071304
2003-04-01	26.8227424749164
2003-07-01	26.6546810494074
2003-10-01	25.8314562077647
2004-01-01	25.8026237721669
2004-04-01	25.8950272613808
2004-07-01	25.9756416972237
2004-10-01	24.4099621854218
2005-01-01	24.6201791975068
2005-04-01	25.6473329880891
2005-07-01	25.3049370764763
2005-10-01	24.3269292552850
2006-01-01	24.0486088903102
2006-04-01	24.8742598841281
2006-07-01	24.9904761904762
2006-10-01	23.9321647788395
2007-01-01	23.9750220764476
2007-04-01	24.8661923052704
2007-07-01	24.8239879306010
2007-10-01	24.1537111334002
2008-01-01	25.1469300987870
2008-04-01	25.1264123852925
2008-07-01	25.5858888057841
2008-10-01	23.9152057689917
2009-01-01	25.1239464551314
2009-04-01	25.3213844252163
2009-07-01	26.5931221496364
2009-10-01	25.2809333742708
2010-01-01	25.8092149544147
2010-04-01	25.9709330727894
2010-07-01	26.0803315657951
2010-10-01	25.6061250531689
2011-01-01	25.3984606993516
2011-04-01	26.1303795169784
2011-07-01	26.2136509279971
2011-10-01	25.3770056701653
2012-01-01	25.2046713219360
2012-04-01	26.5199350532203
2012-07-01	26.9385548681602
2012-10-01	27.1087946321591
2013-01-01	26.8470405542615
2013-04-01	27.1015787905868
2013-07-01	26.5629638425459
2013-10-01	25.4873006497342
2014-01-01	25.2334253332550
2014-04-01	26.0353992639757
2014-07-01	26.5218401486989
2014-10-01	25.0317295488635
2015-01-01	24.5799162700006
2015-04-01	25.7120072909547
2015-07-01	26.6409922410375
2015-10-01	25.7689063817824
2016-01-01	25.3040955250530
2016-04-01	25.0634868057856
2016-07-01	24.6843087734710
2016-10-01	23.6513391152566
2017-01-01	23.3856988082340
2017-04-01	24.3132607993106
2017-07-01	24.0664345030806
2017-10-01	23.3301374240972
2018-01-01	23.4933065241547
2018-04-01	24.1274019478810
2018-07-01	24.3277244849819