Quarter	Percent
1999-04-01	75.2312629790448
2000-01-01	73.9445415938046
2000-04-01	75.5029363988504
2000-07-01	75.3437500000000
2000-10-01	74.6919371989742
2001-01-01	74.1829253137815
2001-04-01	75.1616513305148
2001-07-01	75.1337230998880
2001-10-01	74.3674230649674
2002-01-01	73.5557062704236
2002-04-01	74.6330331812014
2002-07-01	74.5523033222181
2002-10-01	73.3802729911679
2003-01-01	72.6070181884990
2003-04-01	73.0585497305243
2003-07-01	72.8884254431700
2003-10-01	72.4605658871908
2004-01-01	71.7437549383091
2004-04-01	72.5316147859922
2004-07-01	73.0341854393102
2004-10-01	72.3922282938676
2005-01-01	71.6088707254042
2005-04-01	72.4340880427602
2005-07-01	72.7387387387388
2005-10-01	72.7026701948521
2006-01-01	71.9184539241103
2006-04-01	72.6632635099454
2006-07-01	73.4058098077036
2006-10-01	73.2206353832702
2007-01-01	72.9184823659288
2007-04-01	73.8575307643422
2007-07-01	74.3483514586570
2007-10-01	74.4304522037779
2008-01-01	74.2647477103362
2008-04-01	75.3951617472098
2008-07-01	75.4246374358106
2008-10-01	74.0680440152706
2009-01-01	72.8010295434199
2009-04-01	73.6604656343990
2009-07-01	72.7222253067570
2009-10-01	72.0022093344380
2010-01-01	71.4584135011819
2010-04-01	72.2587358965933
2010-07-01	72.0648436220730
2010-10-01	71.6029954417191
2011-01-01	70.5774419859687
2011-04-01	71.2842014728807
2011-07-01	72.1430866445325
2011-10-01	71.6719914802982
2012-01-01	71.4807947019868
2012-04-01	71.9736495388669
2012-07-01	71.9538421190664
2012-10-01	71.1495273410978
2013-01-01	70.6614583333334
2013-04-01	71.3336103032821
2013-07-01	71.5653794388653
2013-10-01	70.7484396760716
2014-01-01	70.2581773297675
2014-04-01	71.1546349466776
2014-07-01	71.2514667618999