Quarter	Percent
1986-01-01	2.02914340187934
1986-04-01	2.20288278487898
1986-07-01	2.38095238095238
1986-10-01	2.40849095114982
1987-01-01	2.43013365735115
1987-04-01	2.42284786139686
1987-07-01	2.79616371741186
1987-10-01	2.65870862723820
1988-01-01	3.09908930270491
1988-04-01	3.70420995079278
1988-07-01	4.73763944360281
1988-10-01	4.47476125511596
1989-01-01	5.19890260631001
1989-04-01	5.66296448649390
1989-07-01	5.44077134986226
1989-10-01	5.22920669777656
1990-01-01	5.86634000272220
1990-04-01	6.42313959804454
1990-07-01	6.41827576828937
1990-10-01	7.11111111111111
1991-01-01	7.99356223175966
1991-04-01	8.29326923076923
1991-07-01	9.04361744697879
1991-10-01	8.99026277177538
1992-01-01	9.00912819155973
1992-04-01	8.62160021124901
1992-07-01	9.08368644067796
1992-10-01	8.73466156485024
1993-01-01	8.53179795864957
1993-04-01	8.13440581214323
1993-07-01	8.45143674424652
1993-10-01	7.97184900831734
1994-01-01	7.79253960143076
1994-04-01	7.08771041640299
1994-07-01	7.04117946110829
1994-10-01	6.08455651737549
1995-01-01	5.77833125778331
1995-04-01	4.83169792572351
1995-07-01	4.87503093293739
1995-10-01	4.61876832844575
1996-01-01	4.95658465991317
1996-04-01	4.58660229330115
1996-07-01	4.87687687687688
1996-10-01	4.83200759824291
1997-01-01	5.39453448479830
1997-04-01	5.09253801721089
1997-07-01	5.43567975474590
1997-10-01	5.26686217008798
1998-01-01	5.72465464762351
1998-04-01	6.09541671550815
1998-07-01	6.37422086322474
1998-10-01	6.07438498309432
1999-01-01	6.31652012956964
1999-04-01	5.77571179546775
1999-07-01	5.68261376896149
1999-10-01	5.00460193281178
2000-01-01	4.86374611935150
2000-04-01	4.73128158015618
2000-07-01	4.77007549759780
2000-10-01	4.12828386216308
2001-01-01	4.22823368947488
2001-04-01	4.12676698586411
2001-07-01	4.14584279872785
2001-10-01	3.97047310144279
2002-01-01	4.31519699812383
2002-04-01	3.54970695565631
2002-07-01	3.87032748924909
2002-10-01	3.41683146561195
2003-01-01	3.62484987444044
2003-04-01	3.29790730798729
2003-07-01	3.12670225514762
2003-10-01	2.91765722930625
2004-01-01	3.05630026809651
2004-04-01	2.40451111820406
2004-07-01	2.34035793709626
2004-10-01	2.09812108559499
2005-01-01	2.57742673040948
2005-04-01	2.53812408606643
2005-07-01	2.14809459878137
2005-10-01	2.12418300653595
2006-01-01	2.81690140845070
2006-04-01	2.18033622007132
2006-07-01	2.34184914841849
2006-10-01	1.99395770392749
2007-01-01	2.17434869739479
2007-04-01	2.18283768899569
2007-07-01	1.76706827309237
2007-10-01	1.95335858082519
2008-01-01	2.25360576923077
2008-04-01	2.42931103146157
2008-07-01	2.57587859424920
2008-10-01	2.67594589296216
2009-01-01	3.78907795805303
2009-04-01	3.82535155865867
2009-07-01	4.23401090728805
2009-10-01	4.21940928270042
2010-01-01	4.04573438874230
2010-04-01	4.35205919579398
2010-07-01	3.80287155607295
2010-10-01	3.95030573619334
2011-01-01	3.69439071566731
2011-04-01	3.73913043478261
2011-07-01	3.70977066872230
2011-10-01	3.89448441247002
2012-01-01	4.10447761194030
2012-04-01	4.14212609829101
2012-07-01	4.55560951918407
2012-10-01	3.97087378640777
2013-01-01	3.50775754071504
2013-04-01	3.71861222925053
2013-07-01	3.68786237049710
2013-10-01	3.08012093726379
2014-01-01	3.39157245632066
2014-04-01	2.97491373682738
2014-07-01	3.14806165343298
2014-10-01	2.93764434180139
2015-01-01	3.40639269406393
2015-04-01	3.13553914866466
2015-07-01	3.40523175768701
2015-10-01	2.87220505362661
2016-01-01	3.31357758620690
2016-04-01	3.14608710892998
2016-07-01	3.04528891202499
2016-10-01	3.07058924436058
2017-01-01	2.83603634202259
2017-04-01	2.92506111438928
2017-07-01	2.54718556873225
2017-10-01	2.46954504019226
2018-01-01	2.48805404514747
2018-04-01	2.69316035799327
2018-07-01	2.68510984540277