Quarter	Percent
1986-01-01	49.0630033453104
1986-04-01	49.7042717878012
1986-07-01	49.8851656693125
1986-10-01	49.3906232027962
1987-01-01	49.2834220102488
1987-04-01	49.0004915329670
1987-07-01	49.8537447134206
1987-10-01	49.0937054603139
1988-01-01	48.5972205371675
1988-04-01	48.2182208287827
1988-07-01	48.0927214752401
1988-10-01	47.5029905486262
1989-01-01	47.3615366234804
1989-04-01	47.5752376763806
1989-07-01	47.6982252003994
1989-10-01	46.8907839795578
1990-01-01	46.8759863757791
1990-04-01	47.5399896687884
1990-07-01	47.8904483736491
1990-10-01	47.0090500827613
1991-01-01	46.7027400290241
1991-04-01	48.1837054921120
1991-07-01	47.3117176058070
1991-10-01	46.9691181931648
1992-01-01	46.6526793392841
1992-04-01	47.5694492030644
1992-07-01	47.1689322344438
1992-10-01	45.6859965801752
1993-01-01	45.0310681711370
1993-04-01	45.8204645193343
1993-07-01	44.4762942981435
1993-10-01	44.0024331648992
1994-01-01	43.7871411750168
1994-04-01	45.0949830409214
1994-07-01	45.3895353192592
1994-10-01	44.0146570364359
1995-01-01	44.3016272461086
1995-04-01	45.6384687585277
1995-07-01	45.6293866371537
1995-10-01	45.1237238945208
1996-01-01	45.1093974581948
1996-04-01	45.9453247924192
1996-07-01	46.6091841055536
1996-10-01	45.4622736589950
1997-01-01	45.9193746072872
1997-04-01	46.2934085192463
1997-07-01	45.3990195908744
1997-10-01	45.5698445090740
1998-01-01	45.7853655467112
1998-04-01	45.9190554733019
1998-07-01	45.5866076761295
1998-10-01	44.6436498127288
1999-01-01	45.3603156630127
1999-04-01	45.7580111604905
1999-07-01	45.3326389312117
1999-10-01	44.4600972618903
2000-01-01	45.2993954471039
2000-04-01	45.7454523616054
2000-07-01	45.7798185889751
2000-10-01	45.6419683181544
2001-01-01	46.5439380591189
2001-04-01	46.4307273701812
2001-07-01	45.9835737534221
2001-10-01	45.6085139815177
2002-01-01	46.0778680195931
2002-04-01	46.6647019227751
2002-07-01	46.6905265384719
2002-10-01	45.8028953046851
2003-01-01	45.4085786519261
2003-04-01	45.4797797128351
2003-07-01	46.0830451825031
2003-10-01	45.2427778026416
2004-01-01	45.3048785099030
2004-04-01	45.3395538270224
2004-07-01	45.3372240661868
2004-10-01	43.8795120769792
2005-01-01	44.2280501635302
2005-04-01	44.3159664415529
2005-07-01	44.6262695070597
2005-10-01	44.6284638035374
2006-01-01	44.4372365105996
2006-04-01	45.2055059772335
2006-07-01	45.8250115151052
2006-10-01	45.4609428628428
2007-01-01	44.8622414731101
2007-04-01	45.5348049476508
2007-07-01	45.4901180899677
2007-10-01	44.3538900357891
2008-01-01	43.7872065546403
2008-04-01	43.9744513810249
2008-07-01	44.4038674603661
2008-10-01	43.6707746941712
2009-01-01	43.9669034431957
2009-04-01	44.0426762848484
2009-07-01	44.3814792153771
2009-10-01	44.1382358787133
2010-01-01	42.3146946447770
2010-04-01	42.0265675439510
2010-07-01	41.0901338272860
2010-10-01	40.7044685892654
2011-01-01	40.3426912138187
2011-04-01	40.0924638952274
2011-07-01	40.1038859106122
2011-10-01	40.2607691184216
2012-01-01	40.1071243812682
2012-04-01	40.5813011085089
2012-07-01	40.6612719418219
2012-10-01	40.4641590076334
2013-01-01	40.3668312371260
2013-04-01	40.4377656535307
2013-07-01	40.9244021583615
2013-10-01	40.0695385202556
2014-01-01	39.8735276544768
2014-04-01	40.4191315318006
2014-07-01	40.5583736008630
2014-10-01	39.9558052626435
2015-01-01	40.4251224544026
2015-04-01	40.4251118028615
2015-07-01	40.3169528171679
2015-10-01	40.1790933568483
2016-01-01	40.5615051080935
2016-04-01	40.5642113988957
2016-07-01	40.5733038904338
2016-10-01	40.4541440390711
2017-01-01	40.5343646103629
2017-04-01	40.4190063766146
2017-07-01	40.2955626102084
2017-10-01	39.9395172742111
2018-01-01	40.0513343690100
2018-04-01	40.1344730572989
2018-07-01	40.7931924831332