Quarter	Percent
1986-01-01	3.97062198760615
1986-04-01	3.77742592173716
1986-07-01	3.75618533513270
1986-10-01	3.43820224719101
1987-01-01	3.51814740592296
1987-04-01	3.23003055434308
1987-07-01	3.32613390928726
1987-10-01	3.03353984191412
1988-01-01	3.97394136807818
1988-04-01	3.88805810724204
1988-07-01	4.87649063032368
1988-10-01	4.19327373350362
1989-01-01	5.23057216054654
1989-04-01	5.52817655881723
1989-07-01	5.13199577613516
1989-10-01	5.17928286852590
1990-01-01	5.43933054393305
1990-04-01	4.84735973597360
1990-07-01	5.59770350625384
1990-10-01	6.06854838709677
1991-01-01	7.73678963110668
1991-04-01	7.75930324623911
1991-07-01	7.57936507936508
1991-10-01	7.58538522637014
1992-01-01	8.38570306362922
1992-04-01	7.73705642815590
1992-07-01	7.35668166699276
1992-10-01	7.84162982894484
1993-01-01	7.65949195268567
1993-04-01	7.69525267993874
1993-07-01	6.73040152963671
1993-10-01	6.47536341325278
1994-01-01	7.31206864390972
1994-04-01	5.75994054254924
1994-07-01	5.65305745427674
1994-10-01	5.78452639190166
1995-01-01	5.61187545257060
1995-04-01	5.50196498749553
1995-07-01	4.72733711048159
1995-10-01	4.81736368448915
1996-01-01	5.54108042383186
1996-04-01	5.36660399931636
1996-07-01	5.15498652291105
1996-10-01	4.61799660441426
1997-01-01	5.94244849310404
1997-04-01	5.53026471084134
1997-07-01	5.30899346843075
1997-10-01	5.19153225806452
1998-01-01	6.27189324437031
1998-04-01	7.02458605117913
1998-07-01	5.82847626977519
1998-10-01	6.49499753977366
1999-01-01	6.19164619164619
1999-04-01	5.85270687693058
1999-07-01	5.12654120700844
1999-10-01	4.94223363286264
2000-01-01	5.45396214308630
2000-04-01	5.15112122196945
2000-07-01	4.56657586925172
2000-10-01	3.97002551020408
2001-01-01	4.60044571792423
2001-04-01	4.22782386726228
2001-07-01	3.99872550581488
2001-10-01	4.10040536326785
2002-01-01	4.56321300203157
2002-04-01	4.60204885736801
2002-07-01	4.35053796974895
2002-10-01	3.70598185452868
2003-01-01	4.26591935232757
2003-04-01	4.01799565622091
2003-07-01	4.01098063138630
2003-10-01	3.79593076222290
2004-01-01	4.44410738662218
2004-04-01	3.28422344996931
2004-07-01	3.12358533272974
2004-10-01	3.01813856675587
2005-01-01	3.53903345724907
2005-04-01	2.56296296296296
2005-07-01	3.01522248243560
2005-10-01	3.28734957440564
2006-01-01	3.48854181871260
2006-04-01	2.72266473569877
2006-07-01	2.80955829109341
2006-10-01	2.92954445583712
2007-01-01	3.47312292837583
2007-04-01	2.69568977944356
2007-07-01	2.82181818181818
2007-10-01	2.58571428571430
2008-01-01	3.66985784740354
2008-04-01	2.74889616863695
2008-07-01	3.02476083286436
2008-10-01	3.07239057239057
2009-01-01	3.85158013544018
2009-04-01	3.77278507842308
2009-07-01	4.43908665437525
2009-10-01	4.63706835799859
2010-01-01	5.34372785258682
2010-04-01	4.91803278688525
2010-07-01	4.92224283064631
2010-10-01	4.79237770193402
2011-01-01	5.42210984688861
2011-04-01	4.75587448993950
2011-07-01	5.41531518826682
2011-10-01	4.68180543874404
2012-01-01	5.90468156895824
2012-04-01	5.41837166643149
2012-07-01	5.79281183932347
2012-10-01	4.62370180680040
2013-01-01	5.75600168468342
2013-04-01	5.19021354829586
2013-07-01	5.08545227177991
2013-10-01	4.98897464167585
2014-01-01	5.41506322155030
2014-04-01	4.85463903185422
2014-07-01	5.35908596300328
2014-10-01	5.16890516890517
2015-01-01	5.22690437601297
2015-04-01	5.41530944625407
2015-07-01	4.59817164688223
2015-10-01	4.34606559589688
2016-01-01	4.80948574473754
2016-04-01	4.39344262295082
2016-07-01	4.15206954716492
2016-10-01	4.54719144058082
2017-01-01	5.14379830229317
2017-04-01	3.88448760541784
2017-07-01	4.06707545989238
2017-10-01	3.83513883700660
2018-01-01	4.41632551792582
2018-04-01	4.07962644384370
2018-07-01	3.65823717161797