Quarterly Percent
1999-04-01 77.2
2000-01-01 74.6
2000-04-01 73.6
2000-07-01 73
2000-10-01 72.1
2001-01-01 71.8
2001-04-01 71.7
2001-07-01 71.5
2001-10-01 71.3
2002-01-01 70.3
2002-04-01 70.6
2002-07-01 68.4
2002-10-01 68.3
2003-01-01 67.6
2003-04-01 67.4
2003-07-01 67.2
2003-10-01 67.5
2004-01-01 66.4
2004-04-01 66.4
2004-07-01 65.1
2004-10-01 64.5
2005-01-01 64
2005-04-01 63.7
2005-07-01 63.5
2005-10-01 62.9
2006-01-01 62.5
2006-04-01 62
2006-07-01 61
2006-10-01 60.3
2007-01-01 59.9
2007-04-01 58.5
2007-07-01 58
2007-10-01 58
2008-01-01 57.5
2008-04-01 56.6
2008-07-01 56.2
2008-10-01 55.7
2009-01-01 54.1
2009-04-01 54.8
2009-07-01 53.7
2009-10-01 53.4
2010-01-01 56.2
2010-04-01 56.1
2010-07-01 55.5
2010-10-01 54.3
2011-01-01 53.1
2011-04-01 52.5
2011-07-01 51.5
2011-10-01 50
2012-01-01 50.1
2012-04-01 49.2
2012-07-01 49.0
2012-10-01 47.8
2013-01-01 47.8
2013-04-01 47.3
2013-07-01 47.0
2013-10-01 46.8
2014-01-01 46.5
2014-04-01 46
2014-07-01 45.1
2014-10-01 45.1
2015-01-01 44.5
2015-04-01 43.1
2015-07-01 42.8
2015-10-01 42.9
2016-01-01 42.1
2016-04-01 41.3
2016-07-01 41.0
2016-10-01 41.3
2017-01-01 40.7
2017-04-01 39.6
2017-07-01 39.8
2017-10-01 39.4
2018-01-01 39.1
2018-04-01 38.2