Quarter	Percent
1999-01-01	14.99260056504780
1999-04-01	13.18778226129710
1999-07-01	11.97190592742360
1999-10-01	12.54027785114360
2000-01-01	12.69031465356060
2000-04-01	9.87081465858160
2000-07-01	10.05417463352450
2000-10-01	9.98693298487960
2001-01-01	10.66319189944890
2001-04-01	8.92948978210854
2001-07-01	8.60536522301228
2001-10-01	9.15323126947568
2002-01-01	8.68463362127694
2002-04-01	7.87297297297297
2002-07-01	7.12491314340692
2002-10-01	8.88720707084358
2003-01-01	9.70106234044305
2003-04-01	8.38043478260870
2003-07-01	7.65545116303970
2003-10-01	8.08202978014299
2004-01-01	9.51086956521739
2004-04-01	7.65686116915823
2004-07-01	7.05772314270444
2004-10-01	7.82653253863373
2005-01-01	8.09284599085267
2005-04-01	7.05655017913960
2005-07-01	6.64144770613196
2005-10-01	7.46809580595061
2006-01-01	8.25737607299510
2006-04-01	8.03033787105263
2006-07-01	6.72678215008163
2006-10-01	6.99197845493918
2007-01-01	8.02491948682752
2007-04-01	5.97610607850860
2007-07-01	5.78357723999896
2007-10-01	5.98025016458196
2008-01-01	7.29692279536720
2008-04-01	5.53957021022889
2008-07-01	5.97556611971579
2008-10-01	7.48258963115811
2009-01-01	10.19909644883380
2009-04-01	9.19093851132686
2009-07-01	8.29685327290519
2009-10-01	8.45603484031522
2010-01-01	9.52755286534078
2010-04-01	7.96167652299667
2010-07-01	7.21612380780997
2010-10-01	7.19478631147115
2011-01-01	8.07947067873041
2011-04-01	6.81319978920358
2011-07-01	6.46887660700965
2011-10-01	6.38160198643731
2012-01-01	6.80245082472554
2012-04-01	5.64679914812046
2012-07-01	5.37049384691329
2012-10-01	5.43873454293545
2013-01-01	6.14441918484121
2013-04-01	5.71458541926524
2013-07-01	5.68809415482599
2013-10-01	5.61212638309618
2014-01-01	6.02232183293336
2014-04-01	5.41336438582972
2014-07-01	5.13030956980846
2014-10-01	5.37103357866774
2015-01-01	6.12238852623350
2015-04-01	5.80520692888829
2015-07-01	5.40888675549184
2015-10-01	5.95960000407135
2016-01-01	6.23372623839516
2016-04-01	5.87400764675981
2016-07-01	5.46309009548169
2016-10-01	5.42859407995287
2017-01-01	5.71040399269070
2017-04-01	5.33993489309284
2017-07-01	5.11944712411046
2017-10-01	5.27481657904146
2018-01-01	5.22783190891155
2018-04-01	4.79886492612208
2018-07-01	4.64819619908740