Quarter	Percent, Seasonally Adjusted
1999-01-01	72.7405049303846
1999-04-01	72.7120362117912
1999-07-01	72.6712900721138
1999-10-01	72.7621889242902
2000-01-01	73.5571240772014
2000-04-01	73.4664908455669
2000-07-01	73.7742249700715
2000-10-01	74.3684561347100
2001-01-01	74.1649629059984
2001-04-01	74.3602430613379
2001-07-01	74.3208028333173
2001-10-01	75.0803653587149
2002-01-01	75.7579594416718
2002-04-01	76.2406552764700
2002-07-01	76.1466997047831
2002-10-01	76.7095911987227
2003-01-01	76.5313358149438
2003-04-01	76.8830968342182
2003-07-01	77.2370542755380
2003-10-01	76.8040767124396
2004-01-01	74.7239174139657
2004-04-01	74.4609102380118
2004-07-01	74.8662334342312
2004-10-01	74.8330266968498
2005-01-01	74.8628193325500
2005-04-01	75.1895224992213
2005-07-01	75.5152944883153
2005-10-01	75.3553681606956
2006-01-01	75.6965285943002
2006-04-01	75.9716489490608
2006-07-01	76.2901030070230
2006-10-01	75.8715072682537
2007-01-01	76.2337498472112
2007-04-01	76.3651164924443
2007-07-01	77.0673926751240
2007-10-01	77.1868915205219
2008-01-01	77.3095044767854
2008-04-01	77.9699381287997
2008-07-01	77.7926708998952
2008-10-01	78.1934430080784
2009-01-01	78.1950356620216
2009-04-01	78.5355014748034
2009-07-01	78.3944609091930
2009-10-01	78.3451255115888
2010-01-01	78.6098754024353
2010-04-01	78.4835894152612
2010-07-01	78.8960479770698
2010-10-01	79.7527841908148
2011-01-01	79.3845009510941
2011-04-01	79.6807465018758
2011-07-01	80.0039352854173
2011-10-01	80.2572225507408
2012-01-01	80.5238286970799
2012-04-01	80.5299437489466
2012-07-01	80.3151777827100
2012-10-01	80.2260274276053
2013-01-01	80.4173330311952
2013-04-01	80.4742208027448
2013-07-01	80.7029935028101
2013-10-01	80.3039084003940
2014-01-01	80.7158453067533
2014-04-01	80.6071388482718
2014-07-01	79.9662106799893
2014-10-01	79.9247407336326
2015-01-01	79.8469119926296
2015-04-01	79.9289892031304
2015-07-01	80.5212211808309
2015-10-01	80.7872623007234
2016-01-01	80.5163096168889
2016-04-01	80.4467025464273
2016-07-01	80.6317869813233
2016-10-01	80.6695959374306
2017-01-01	80.8616049015091
2017-04-01	81.0007428504006
2017-07-01	80.9031848839897
2017-10-01	81.2941266330697
2018-01-01	81.2973764375072
2018-04-01	81.4882656592261