Quarterly Percent
1999-01-01 78.8
1999-04-01 78.8
1999-07-01 78.8
1999-10-01 78.9
2000-01-01 78.4
2000-04-01 77.5
2000-07-01 77
2000-10-01 76.4
2001-01-01 76.6
2001-04-01 76.7
2001-07-01 76.2
2001-10-01 75.8
2002-01-01 75.5
2002-04-01 74.9
2002-07-01 75.3
2002-10-01 74.9
2003-01-01 74.7
2003-04-01 73.9
2003-07-01 73.5
2003-10-01 73.2
2004-01-01 72.7
2004-04-01 72.4
2004-07-01 72.5
2004-10-01 72.2
2005-01-01 70.5
2005-04-01 70
2005-07-01 70.5
2005-10-01 69.4
2006-01-01 68.5
2006-04-01 69
2006-07-01 69.7
2006-10-01 68.2
2007-01-01 67.3
2007-04-01 67.1
2007-07-01 67.8
2007-10-01 66.8
2008-01-01 66.3
2008-04-01 66
2008-07-01 66.1
2008-10-01 64.6
2009-01-01 63.8
2009-04-01 62.5
2009-07-01 63
2009-10-01 62.5
2010-01-01 61.9
2010-04-01 62.3
2010-07-01 61.5
2010-10-01 60.5
2011-01-01 59.8
2011-04-01 58.2
2011-07-01 57.4
2011-10-01 57.5
2012-01-01 57.2
2012-04-01 55.8
2012-07-01 55.5
2012-10-01 56
2013-01-01 55.4
2013-04-01 55
2013-07-01 54.8
2013-10-01 54
2014-01-01 53.6
2014-04-01 53.1
2014-07-01 53.5
2014-10-01 52.2
2015-01-01 51.7
2015-04-01 51.0
2015-07-01 50.8
2015-10-01 48.9
2016-01-01 48.5
2016-04-01 48.6
2016-07-01 48.0
2016-10-01 48.1
2017-01-01 48.4
2017-04-01 48.0
2017-07-01 48.5
2017-10-01 47.9
2018-01-01 47.3
2018-04-01 47.2
2018-07-01 47.5