Quarter	Percent
1986-01-01	3.75451263537906
1986-04-01	3.65153886280647
1986-07-01	3.67523167649537
1986-10-01	3.79375392999371
1987-01-01	3.90689941812136
1987-04-01	4.06640748134916
1987-07-01	4.16622830089427
1987-10-01	4.33962264150943
1988-01-01	5.20591341077086
1988-04-01	5.49615055603080
1988-07-01	6.42818428184282
1988-10-01	6.58893999358220
1989-01-01	7.55888650963598
1989-04-01	7.76920569379550
1989-07-01	7.63333698390100
1989-10-01	7.15677782589866
1990-01-01	7.69978401727862
1990-04-01	8.37028225370390
1990-07-01	8.53844478327162
1990-10-01	9.36565570269116
1991-01-01	10.55104656129860
1991-04-01	10.96067053513860
1991-07-01	12.03614069054530
1991-10-01	12.10800467736790
1992-01-01	12.12858200274930
1992-04-01	11.28928800513150
1992-07-01	11.56704361873990
1992-10-01	11.24681393372980
1993-01-01	11.27295756808110
1993-04-01	10.69049381410600
1993-07-01	10.21299254526090
1993-10-01	10.20280811232450
1994-01-01	10.09555463232240
1994-04-01	9.05597673694049
1994-07-01	8.46153846153846
1994-10-01	7.98895253682488
1995-01-01	7.22487552078041
1995-04-01	6.26149131767109
1995-07-01	6.29135701924056
1995-10-01	6.32974481658692
1996-01-01	6.72761601907980
1996-04-01	6.02843981574204
1996-07-01	6.42850034829336
1996-10-01	6.54223968565815
1997-01-01	6.79297143418082
1997-04-01	6.89655172413793
1997-07-01	6.95772149403765
1997-10-01	7.14909302551170
1998-01-01	7.70499757399321
1998-04-01	7.90638214180352
1998-07-01	8.06579468886246
1998-10-01	8.06783648661896
1999-01-01	8.28777821163609
1999-04-01	7.65877340731200
1999-07-01	7.31683168316832
1999-10-01	6.42905700689521
2000-01-01	6.82746547364326
2000-04-01	6.32961390342648
2000-07-01	6.27208480565371
2000-10-01	6.03929878636101
2001-01-01	5.81811152991205
2001-04-01	5.62842599843383
2001-07-01	5.31593807808392
2001-10-01	5.60845553227957
2002-01-01	5.56440281030445
2002-04-01	5.01379507182951
2002-07-01	5.45781309118426
2002-10-01	4.87827628019774
2003-01-01	5.07797994801337
2003-04-01	4.51516004881254
2003-07-01	4.21101774042949
2003-10-01	4.30907754502021
2004-01-01	4.01243030801572
2004-04-01	3.63006202116016
2004-07-01	3.51548269581056
2004-10-01	3.36799075802008
2005-01-01	4.09719758779709
2005-04-01	3.70802657568684
2005-07-01	3.41537364009274
2005-10-01	3.16627306918569
2006-01-01	4.08854166666667
2006-04-01	3.30766538326916
2006-07-01	3.59082150989665
2006-10-01	3.49680538767052
2007-01-01	3.94114103777644
2007-04-01	3.24013587666580
2007-07-01	3.26445563465880
2007-10-01	3.33390616944492
2008-01-01	3.96735827762827
2008-04-01	3.77587252100113
2008-07-01	4.15686274509804
2008-10-01	4.27116322862278
2009-01-01	5.59301521438451
2009-04-01	5.51956465405546
2009-07-01	6.38949671772429
2009-10-01	6.62604068320316
2010-01-01	6.08830631252156
2010-04-01	6.60043196544276
2010-07-01	5.64878892733564
2010-10-01	6.05748605748606
2011-01-01	6.16672360778955
2011-04-01	5.92759008035946
2011-07-01	5.74245438035112
2011-10-01	6.23611822996754
2012-01-01	6.57715839564922
2012-04-01	6.09110629067245
2012-07-01	6.75793512382281
2012-10-01	6.19230099285839
2013-01-01	5.50546211201665
2013-04-01	5.49965301873699
2013-07-01	5.53110708430408
2013-10-01	5.16161787104417
2014-01-01	5.42330259849120
2014-04-01	4.59286675639300
2014-07-01	4.67447148993515
2014-10-01	5.05424063116371
2015-01-01	5.47566821025266
2015-04-01	4.82006721862448
2015-07-01	5.36303630363036
2015-10-01	4.90251597767171
2016-01-01	5.35215761346415
2016-04-01	4.72919627348808
2016-07-01	4.96514997258987
2016-10-01	5.04253199478887
2017-01-01	4.66317308422572
2017-04-01	4.78454224812145
2017-07-01	4.30909783022459
2017-10-01	4.23684407515533
2018-01-01	4.25658580145855
2018-04-01	4.38157796521609
2018-07-01	3.97222429627417