Quarterly Percent
1998-04-01 76.2
1999-01-01 73.7
1999-04-01 73.8
1999-07-01 74.3
1999-10-01 74.8
2000-01-01 73.3
2000-04-01 74.1
2000-07-01 71.7
2000-10-01 72.4
2001-01-01 74.3
2001-04-01 74
2001-07-01 74.2
2001-10-01 73.8
2002-01-01 72.2
2002-04-01 73.3
2002-07-01 71.7
2002-10-01 72
2003-01-01 72.7
2003-04-01 71.5
2003-07-01 70.7
2003-10-01 69.5
2004-01-01 69.5
2004-04-01 68.7
2004-07-01 68.2
2004-10-01 68.9
2005-01-01 68
2005-04-01 66.5
2005-07-01 65.8
2005-10-01 66.6
2006-01-01 67.3
2006-04-01 67.8
2006-07-01 66.1
2006-10-01 64.4
2007-01-01 63.9
2007-04-01 64.8
2007-07-01 64.3
2007-10-01 63.5
2008-01-01 63.9
2008-04-01 65.9
2008-07-01 62.3
2008-10-01 63.5
2009-01-01 64.1
2009-04-01 63.1
2009-07-01 62.2
2009-10-01 62
2010-01-01 61.5
2010-04-01 61.2
2010-07-01 60.4
2010-10-01 60.4
2011-01-01 61.1
2011-04-01 58.3
2011-07-01 59.5
2011-10-01 59.8
2012-01-01 59.8
2012-04-01 58
2012-07-01 57.8
2012-10-01 59.1
2013-01-01 56.9
2013-04-01 56.2
2013-07-01 54.5
2013-10-01 56
2014-01-01 56.6
2014-04-01 54.1
2014-07-01 55.5
2014-10-01 53.5
2015-01-01 54.3
2015-04-01 53.4
2015-07-01 52.8
2015-10-01 53.0
2016-01-01 53.5
2016-04-01 51.2
2016-07-01 51.7
2016-10-01 50.9
2017-01-01 50.2
2017-04-01 49.1
2017-07-01 48.2
2017-10-01 47.4
2018-01-01 48.0
2018-04-01 48.0