Quarter	Percent
2005-01-01	2.75204572818407
2005-04-01	2.44164750654087
2005-07-01	2.26276846230275
2005-10-01	1.84106912293107
2006-01-01	2.23265393400849
2006-04-01	1.79465683680496
2006-07-01	2.31904076006601
2006-10-01	2.19178781919441
2007-01-01	2.57865020983945
2007-04-01	1.96604799171660
2007-07-01	2.28205811382782
2007-10-01	2.64469289966604
2008-01-01	2.64925708425101
2008-04-01	2.23542514912926
2008-07-01	2.64337363724871
2008-10-01	2.98338761023089
2009-01-01	3.38242586495993
2009-04-01	3.80180846294937
2009-07-01	3.73144213466767
2009-10-01	3.57303705071583
2010-01-01	3.47697418951007
2010-04-01	3.80442836032122
2010-07-01	3.90117749876671
2010-10-01	4.09375086607886
2011-01-01	3.36651624053550
2011-04-01	3.67198663969391
2011-07-01	3.60573456024461
2011-10-01	3.52503939505059
2012-01-01	3.34881878121546
2012-04-01	3.28501613357978
2012-07-01	3.13351843204408
2012-10-01	3.42443062004701
2013-01-01	3.13258565495558
2013-04-01	3.56506421131402
2013-07-01	3.16087693089016
2013-10-01	3.53543119872288
2014-01-01	3.49462423937057
2014-04-01	3.36515481061618
2014-07-01	3.31308826056950
2014-10-01	2.82525606722579
2015-01-01	2.85731559924856
2015-04-01	2.94378125562151
2015-07-01	2.87721821442692
2015-10-01	3.12492716466612
2016-01-01	3.00261476849624
2016-04-01	2.39540268324686
2016-07-01	2.70588703999795
2016-10-01	1.98832064808129
2017-01-01	2.44164777288237
2017-04-01	2.19292223867850
2017-07-01	2.24711436498909
2017-10-01	2.27866866516358
2018-01-01	2.00031972881136
2018-04-01	1.96684848970660