Quarter	Percent
1969-01-01	3.62257792754844
1969-04-01	2.22984562607204
1969-07-01	2.09030100334448
1969-10-01	2.39726027397260
1970-01-01	2.42005185825411
1970-04-01	1.61702127659574
1970-07-01	1.43702451394759
1970-10-01	2.12224108658744
1971-01-01	2.06362854686156
1971-04-01	1.61564625850340
1971-07-01	1.44804088586031
1971-10-01	2.12404418011895
1972-01-01	2.31560891938250
1972-04-01	1.54639175257732
1972-07-01	1.93277310924370
1972-10-01	1.94420963651733
1973-01-01	1.94750211685013
1973-04-01	1.87393526405451
1973-07-01	1.51898734177215
1973-10-01	1.63090128755365
1974-01-01	2.31560891938250
1974-04-01	1.57545605306799
1974-07-01	1.58862876254181
1974-10-01	2.38297872340426
1975-01-01	2.23559759243336
1975-04-01	2.00348432055749
1975-07-01	2.08695652173913
1975-10-01	2.93103448275862
1976-01-01	2.61780104712042
1976-04-01	2.33160621761658
1976-07-01	2.34171725932350
1976-10-01	2.50000000000000
1977-01-01	2.24331320103538
1977-04-01	1.88841201716738
1977-07-01	2.37087214225233
1977-10-01	2.56191289496157
1978-01-01	2.46179966044143
1978-04-01	2.78951817413356
1978-07-01	2.61865793780687
1978-10-01	3.31674958540630
1979-01-01	3.11710193765796
1979-04-01	2.72502064409579
1979-07-01	3.01548492257539
1979-10-01	3.42857142857143
1980-01-01	2.63591433278418
1980-04-01	2.53267973856209
1980-07-01	2.99750208159867
1980-10-01	3.05785123966942
1981-01-01	3.22847682119205
1981-04-01	3.48460291734198
1981-07-01	3.53413654618474
1981-10-01	4.01929260450161
1982-01-01	3.86130811662727
1982-04-01	4.13683373110581
1982-07-01	5.09652509652510
1982-10-01	5.35714285714286
1983-01-01	5.49450549450549
1983-04-01	5.14018691588785
1983-07-01	4.91036632891660
1983-10-01	4.81452249408051
1984-01-01	3.94537177541730
1984-04-01	3.08734939759036
1984-07-01	3.41499628804751
1984-10-01	3.87481371087928
1985-01-01	3.79939209726444
1985-04-01	3.15078769692423
1985-07-01	3.47694633408919
1985-10-01	3.77643504531722
1986-01-01	3.45604808414726
1986-04-01	2.69058295964126
1986-07-01	2.57731958762887
1986-10-01	3.57142857142857
1987-01-01	4.47870778267254
1987-04-01	3.66568914956012
1987-07-01	4.30107526881720
1987-10-01	3.84336475707034
1988-01-01	3.89048991354467
1988-04-01	3.56622998544396
1988-07-01	4.14878397711016
1988-10-01	4.35714285714286
1989-01-01	3.59971202303816
1989-04-01	3.42857142857143
1989-07-01	3.30752990851513
1989-10-01	3.97163120567376
1990-01-01	3.64400840925018
1990-04-01	3.42178770949721
1990-07-01	3.62765229295003
1990-10-01	3.63013698630137
1991-01-01	3.69609856262834
1991-04-01	3.33333333333333
1991-07-01	3.63147276395427
1991-10-01	3.94912985274431
1992-01-01	3.90469887491727
1992-04-01	3.71335504885994
1992-07-01	3.66795366795367
1992-10-01	3.85369039843240
1993-01-01	4.11227154046997
1993-04-01	4.87804878048780
1993-07-01	4.22712933753943
1993-10-01	4.66876971608833
1994-01-01	4.29003021148036
1994-04-01	3.55421686746988
1994-07-01	3.68171021377672
1994-10-01	4.32136335970785
1995-01-01	4.92581602373887
1995-04-01	4.02160864345738
1995-07-01	4.13421210305572
1995-10-01	4.30563978168587
1996-01-01	5.21270221689634
1996-04-01	3.77588306942753
1996-07-01	4.29262394195889
1996-10-01	4.61725394896719
1997-01-01	5.26315789473684
1997-04-01	3.86240193120097
1997-07-01	4.71641791044776
1997-10-01	4.74759615384615
1998-01-01	5.31914893617021
1998-04-01	4.43379269023367
1998-07-01	4.25914817036593
1998-10-01	4.31654676258993
1999-01-01	4.75319926873857
1999-04-01	3.54174195880014
1999-07-01	3.44066785927251
1999-10-01	3.58345358345358
2000-01-01	4.59330706345939
2000-04-01	3.67554624363963
2000-07-01	3.63420427553444
2000-10-01	3.46158413490084
2001-01-01	4.12510268747800
2001-04-01	3.62957343759118
2001-07-01	3.75900228350606
2001-10-01	3.69402334901551
2002-01-01	4.53027860925628
2002-04-01	3.47141865308956
2002-07-01	3.79601447194625
2002-10-01	3.73697241895549
2003-01-01	4.33967622834422
2003-04-01	4.36612604523262
2003-07-01	3.98143488229044
2003-10-01	4.18222976796831
2004-01-01	5.89078811517724
2004-04-01	5.76571428571429
2004-07-01	6.04512797485406
2004-10-01	5.93124505258396
2005-01-01	5.69684069011875
2005-04-01	5.86137731223535
2005-07-01	6.05235944048332
2005-10-01	5.81318317323617
2006-01-01	5.85141354372124
2006-04-01	5.60488044011112
2006-07-01	5.43937530085040
2006-10-01	5.51343154246100
2007-01-01	5.36912751677852
2007-04-01	5.59414404787348
2007-07-01	5.45511384358881
2007-10-01	4.78182588434654
2008-01-01	4.47383674974970
2008-04-01	4.00883838383838
2008-07-01	4.42583113592886
2008-10-01	4.72632944228275
2009-01-01	4.78952001242686
2009-04-01	4.97681607418856
2009-07-01	5.68636386652489
2009-10-01	4.88168724279835
2010-01-01	4.61506835234865
2010-04-01	4.66872110939908
2010-07-01	4.66043928300934
2010-10-01	4.57669398768009
2011-01-01	4.87990270598966
2011-04-01	4.18765582862667
2011-07-01	4.07529788725343
2011-10-01	5.19748427672956
2012-01-01	4.96670505181996
2012-04-01	4.52293991094211
2012-07-01	5.01649190173780
2012-10-01	4.63635459158293
2013-01-01	5.34491315136476
2013-04-01	4.80807281361298
2013-07-01	5.43098427489808
2013-10-01	5.59247772362526
2014-01-01	5.81008321096427
2014-04-01	5.03934698665624
2014-07-01	5.39869535585629
2014-10-01	5.27909361722909
2015-01-01	5.31820860341780
2015-04-01	5.35705581281989
2015-07-01	5.17233114424045
2015-10-01	5.39163863527150
2016-01-01	5.59313090612558
2016-04-01	5.50138610075519
2016-07-01	5.82127419657959
2016-10-01	5.25565481847558
2017-01-01	5.21275075046457
2017-04-01	4.89102046630894
2017-07-01	5.01741504283159
2017-10-01	5.01344149412819
2018-01-01	4.78357749016261
2018-04-01	4.32902490020909