Quarter	Percent
1986-01-01	30.8823529411765
1986-04-01	33.4002677376171
1986-07-01	33.3780160857909
1986-10-01	33.3557046979866
1987-01-01	32.0323014804845
1987-04-01	31.2415654520918
1987-07-01	31.5753887762001
1987-10-01	32.5880758807588
1988-01-01	32.8813559322034
1988-04-01	32.8125000000000
1988-07-01	32.4710687542546
1988-10-01	32.1964529331514
1989-01-01	30.8954203691046
1989-04-01	31.4852840520192
1989-07-01	30.3632625085675
1989-10-01	29.2783505154639
1990-01-01	29.6347346657478
1990-04-01	31.4226519337017
1990-07-01	30.9342560553633
1990-10-01	30.6306306306306
1991-01-01	30.4227304227304
1991-04-01	31.6446911866759
1991-07-01	31.4583333333333
1991-10-01	31.6446911866759
1992-01-01	31.9444444444444
1992-04-01	32.2692574600972
1992-07-01	32.7323162274619
1992-10-01	33.3102493074792
1993-01-01	33.7024221453287
1993-04-01	34.8788927335640
1993-07-01	35.8921161825726
1993-10-01	34.9655172413793
1994-01-01	35.5127322780454
1994-04-01	35.8075601374570
1994-07-01	36.2577107607951
1994-10-01	38.8395904436860
1995-01-01	38.1632653061224
1995-04-01	38.8474576271186
1995-07-01	38.2591093117409
1995-10-01	40.4554588077696
1996-01-01	40.9726848767488
1996-04-01	43.7002652519894
1996-07-01	43.6100131752306
1996-10-01	43.1743958197257
1997-01-01	45.5016181229774
1997-04-01	43.8021836865768
1997-07-01	44.7066326530612
1997-10-01	43.2466708941027
1998-01-01	44.4794952681388
1998-04-01	45.7627118644068
1998-07-01	46.6916354556804
1998-10-01	47.6485148514851
1999-01-01	49.0484960098220
1999-04-01	49.1163924436319
1999-07-01	48.0943738656987
1999-10-01	46.3985594237695
2000-01-01	45.2976190476190
2000-04-01	46.5212264150943
2000-07-01	49.6789258610625
2000-10-01	49.5953757225434
2001-01-01	50.1145475372280
2001-04-01	50.4550625711035
2001-07-01	53.1531531531532
2001-10-01	53.0816213214881
2002-01-01	51.7505470459519
2002-04-01	54.6191247974068
2002-07-01	54.8318206086492
2002-10-01	54.5071164997364
2003-01-01	55.9313215400624
2003-04-01	58.2089552238806
2003-07-01	57.6158940397351
2003-10-01	58.9627391742195
2004-01-01	58.0757726819541
2004-04-01	59.7332015810277
2004-07-01	60.7929515418502
2004-10-01	60.2035870092099
2005-01-01	61.5163147792706
2005-04-01	60.9709662065683
2005-07-01	63.1852551984877
2005-10-01	63.7429643527204
2006-01-01	62.6803164262448
2006-04-01	63.4473197781885
2006-07-01	60.9733700642792
2006-10-01	61.5139078887369
2007-01-01	63.1793478260870
2007-04-01	65.1801801801802
2007-07-01	64.3559928443649
2007-10-01	63.7128932210899
2008-01-01	64.5330995177554
2008-04-01	64.7237929534580
2008-07-01	65.1554404145078
2008-10-01	64.4967880085653
2009-01-01	65.0807136788445
2009-04-01	65.8937605396290
2009-07-01	66.1229611041405
2009-10-01	68.3119037743675
2010-01-01	68.3257918552036
2010-04-01	69.6238757154538
2010-07-01	68.6839967506093
2010-10-01	69.7580645161290
2011-01-01	69.4400000000000
2011-04-01	69.4080254270958
2011-07-01	69.2611615962070
2011-10-01	70.1533621706646
2012-01-01	70.6504702194357
2012-04-01	71.1553473848556
2012-07-01	72.1056721056721
2012-10-01	69.6173173560108
2013-01-01	71.5935334872979
2013-04-01	72.9398236872365
2013-07-01	72.0548989706443
2013-10-01	72.5653656688139
2014-01-01	74.0489642184557
2014-04-01	73.1762065095398
2014-07-01	73.5687732342008
2014-10-01	75.1015884743258
2015-01-01	73.2745961820852
2015-04-01	73.1021897810219
2015-07-01	72.1739130434783
2015-10-01	72.4398131512756
2016-01-01	72.4322396576320
2016-04-01	74.6284501061571
2016-07-01	73.0782730782731
2016-10-01	72.5626740947075
2017-01-01	74.4989633724948
2017-04-01	74.4170096021948
2017-07-01	74.6253405994550
2017-10-01	74.5350016909029
2018-01-01	74.4123572867696
2018-04-01	73.6666666666667
2018-07-01	73.7992712818814