Quarter	Percent
1986-01-01	22.8585334198572
1986-04-01	26.4946096047043
1986-07-01	27.5777010360138
1986-10-01	25.1484168865435
1987-01-01	24.6570814741365
1987-04-01	26.7353038857522
1987-07-01	28.5452118785452
1987-10-01	26.1204013377926
1988-01-01	27.3749580396106
1988-04-01	30.4391891891892
1988-07-01	32.1780496092423
1988-10-01	30.1774138519277
1989-01-01	30.3103034459112
1989-04-01	33.5519502934070
1989-07-01	34.6981263011797
1989-10-01	30.6395550921098
1990-01-01	31.1760612386917
1990-04-01	31.4071229050279
1990-07-01	33.0414988618456
1990-10-01	30.4606761254160
1991-01-01	30.9982486865149
1991-04-01	33.6842105263158
1991-07-01	34.2475386779184
1991-10-01	31.5326412106282
1992-01-01	32.1711568938193
1992-04-01	35.6512530885987
1992-07-01	36.8337170178856
1992-10-01	33.2090876819311
1993-01-01	34.0206185567010
1993-04-01	36.6018898199323
1993-07-01	37.1397887954179
1993-10-01	33.5008074645613
1994-01-01	32.7282530553559
1994-04-01	35.7773374166817
1994-07-01	34.9593495934959
1994-10-01	32.4642404490313
1995-01-01	32.8861493836113
1995-04-01	34.5804576825282
1995-07-01	34.1343528126707
1995-10-01	29.9726526891522
1996-01-01	31.9890510948905
1996-04-01	34.0219378427788
1996-07-01	33.2477535301669
1996-10-01	32.8673901048372
1997-01-01	32.3746312684366
1997-04-01	34.2212356640770
1997-07-01	35.0232126276694
1997-10-01	31.5328739057553
1998-01-01	32.5112107623318
1998-04-01	35.4154942787470
1998-07-01	36.5040497268789
1998-10-01	35.7952398942199
1999-01-01	35.8211782534571
1999-04-01	39.1634980988593
1999-07-01	38.1787007048962
1999-10-01	35.0676577091671
2000-01-01	35.4242135367016
2000-04-01	39.3968314563848
2000-07-01	39.6564885496183
2000-10-01	34.7743286992954
2001-01-01	36.6711001330040
2001-04-01	37.8219696969697
2001-07-01	38.7309357936358
2001-10-01	34.8776387072670
2002-01-01	33.9811215991116
2002-04-01	37.1653832049872
2002-07-01	38.3790659640196
2002-10-01	35.8955895589559
2003-01-01	36.2050551797793
2003-04-01	39.5594713656388
2003-07-01	38.6729691876751
2003-10-01	35.8871669858959
2004-01-01	36.7491777739311
2004-04-01	39.8931587110115
2004-07-01	40.1236688423222
2004-10-01	34.5535408826548
2005-01-01	36.9954011241696
2005-04-01	39.1953827873027
2005-07-01	38.7686062246279
2005-10-01	35.6457316046472
2006-01-01	33.5120643431635
2006-04-01	37.2038705372039
2006-07-01	37.6623376623377
2006-10-01	33.9484621778886
2007-01-01	33.8203553046654
2007-04-01	37.4210701229644
2007-07-01	37.0364210876434
2007-10-01	34.2310889443059
2008-01-01	37.1404821280133
2008-04-01	38.1878636741480
2008-07-01	39.0596444592125
2008-10-01	34.8655824759376
2009-01-01	37.7361617500829
2009-04-01	39.7221762857615
2009-07-01	41.3753298153034
2009-10-01	38.3111549203220
2010-01-01	39.8755933868064
2010-04-01	41.9333768778576
2010-07-01	42.4010425150676
2010-10-01	39.4446248782072
2011-01-01	39.4199611147116
2011-04-01	42.5056652638394
2011-07-01	43.3538163001294
2011-10-01	40.5165456012914
2012-01-01	39.6095514682156
2012-04-01	41.9302775984506
2012-07-01	42.5782510487254
2012-10-01	42.3715160302884
2013-01-01	41.9012385394885
2013-04-01	43.9216316043038
2013-07-01	43.6279218699968
2013-10-01	38.8968595568309
2014-01-01	39.2069785884219
2014-04-01	42.0612373737374
2014-07-01	42.6509803921569
2014-10-01	35.8155475930830
2015-01-01	36.2536827415103
2015-04-01	39.5814096645122
2015-07-01	40.5828220858896
2015-10-01	37.6009754610578
2016-01-01	36.2327625397788
2016-04-01	39.5642374154771
2016-07-01	39.5502248875562
2016-10-01	34.4049043062201
2017-01-01	34.7495527728086
2017-04-01	39.5560190703218
2017-07-01	38.0881477069684
2017-10-01	33.8740884060128
2018-01-01	34.1162479559982
2018-04-01	37.2508182088664
2018-07-01	37.9171632896305