Quarterly Percent
1999-01-01 81.8
1999-04-01 80.4
1999-07-01 79.2
1999-10-01 78.9
2000-01-01 78.5
2000-04-01 77.4
2000-07-01 76.6
2000-10-01 76
2001-01-01 76.7
2001-04-01 76.2
2001-07-01 75.2
2001-10-01 75.1
2002-01-01 74.9
2002-04-01 74.3
2002-07-01 73.4
2002-10-01 71.8
2003-01-01 71.6
2003-04-01 70.3
2003-07-01 69.9
2003-10-01 69.1
2004-01-01 68.7
2004-04-01 68.7
2004-07-01 67.9
2004-10-01 66.6
2005-01-01 66.5
2005-04-01 65.8
2005-07-01 65.3
2005-10-01 65.1
2006-01-01 65.4
2006-04-01 65.2
2006-07-01 65.8
2006-10-01 65.5
2007-01-01 66.2
2007-04-01 65.8
2007-07-01 66.3
2007-10-01 66.9
2008-01-01 68.1
2008-04-01 67.8
2008-07-01 67.1
2008-10-01 66.7
2009-01-01 66.7
2009-04-01 66
2009-07-01 65.8
2009-10-01 65.1
2010-01-01 65.1
2010-04-01 63.8
2010-07-01 62.8
2010-10-01 62.5
2011-01-01 62
2011-04-01 61.3
2011-07-01 60.7
2011-10-01 60.7
2012-01-01 61.4
2012-04-01 60.1
2012-07-01 60
2012-10-01 60.6
2013-01-01 60.5
2013-04-01 58.9
2013-07-01 58.1
2013-10-01 57.5
2014-01-01 57
2014-04-01 55.7
2014-07-01 54.5
2014-10-01 54.5
2015-01-01 53.8
2015-04-01 52.1
2015-07-01 50.9
2015-10-01 50.8
2016-01-01 49.3
2016-04-01 48.0
2016-07-01 47.3
2016-10-01 46.8
2017-01-01 47.7
2017-04-01 46.7
2017-07-01 45.7
2017-10-01 45.6
2018-01-01 45.0
2018-04-01 45.2