Quarterly Percent
1999-01-01 66.8
1999-04-01 66.1
1999-07-01 67
1999-10-01 68
2000-01-01 66.8
2000-04-01 66.5
2000-07-01 62.7
2000-10-01 65.5
2001-01-01 63.3
2001-04-01 65.2
2001-07-01 61.6
2001-10-01 59.9
2002-01-01 61.4
2002-04-01 61.6
2002-07-01 64.4
2002-10-01 65.8
2003-01-01 66.5
2003-04-01 66.8
2003-07-01 66.8
2003-10-01 61.9
2004-01-01 60.3
2004-04-01 57.3
2004-07-01 56.5
2004-10-01 55.8
2005-01-01 56.9
2005-04-01 55
2005-07-01 52.5
2005-10-01 54
2006-01-01 53
2006-04-01 53.6
2006-07-01 55.4
2006-10-01 54.9
2007-01-01 57.4
2007-04-01 52
2007-07-01 51.1
2007-10-01 53
2008-01-01 55.1
2008-04-01 52
2008-07-01 53.5
2008-10-01 53.9
2009-01-01 54.3
2009-04-01 50.1
2009-07-01 51
2009-10-01 51.8
2010-01-01 51.4
2010-04-01 53.1
2010-07-01 51.1
2010-10-01 54.2
2011-01-01 58.1
2011-04-01 57.2
2011-07-01 56.2
2011-10-01 57.8
2012-01-01 57.7
2012-04-01 57.4
2012-07-01 56
2012-10-01 54.4
2013-01-01 55.3
2013-04-01 54.8
2013-07-01 54.1
2013-10-01 55.3
2014-01-01 57.3
2014-04-01 53.7
2014-07-01 53.2
2014-10-01 53
2015-01-01 55.0
2015-04-01 51.9
2015-07-01 53.2
2015-10-01 54.5
2016-01-01 54.8
2016-04-01 51.9
2016-07-01 53.1
2016-10-01 51.8
2017-01-01 50.2
2017-04-01 47.7
2017-07-01 47.4
2017-10-01 47.6
2018-01-01 47.9
2018-04-01 44.8