Quarterly Percent
1999-01-01 71.6
1999-04-01 69.7
1999-07-01 67.9
1999-10-01 67.8
2000-01-01 67
2000-04-01 65.7
2000-07-01 65.1
2000-10-01 64.3
2001-01-01 65.6
2001-04-01 64.6
2001-07-01 64.1
2001-10-01 64
2002-01-01 64.4
2002-04-01 63.9
2002-07-01 62.9
2002-10-01 61.3
2003-01-01 62.2
2003-04-01 60.6
2003-07-01 60.8
2003-10-01 60.7
2004-01-01 60.7
2004-04-01 61
2004-07-01 60.4
2004-10-01 59
2005-01-01 58.5
2005-04-01 57.9
2005-07-01 57.3
2005-10-01 57
2006-01-01 56.8
2006-04-01 56.8
2006-07-01 57.5
2006-10-01 57
2007-01-01 57.9
2007-04-01 57.7
2007-07-01 57.4
2007-10-01 58.6
2008-01-01 61.2
2008-04-01 60.2
2008-07-01 60
2008-10-01 59.5
2009-01-01 59.4
2009-04-01 58.4
2009-07-01 57.9
2009-10-01 58.5
2010-01-01 59
2010-04-01 57.6
2010-07-01 57.1
2010-10-01 57.6
2011-01-01 57.2
2011-04-01 56.8
2011-07-01 55.8
2011-10-01 55.5
2012-01-01 56.4
2012-04-01 54.3
2012-07-01 53.9
2012-10-01 53.9
2013-01-01 53.2
2013-04-01 51
2013-07-01 50.1
2013-10-01 49.7
2014-01-01 48.9
2014-04-01 47.3
2014-07-01 45.5
2014-10-01 45.6
2015-01-01 44.8
2015-04-01 42.4
2015-07-01 41.0
2015-10-01 40.6
2016-01-01 39.0
2016-04-01 38.0
2016-07-01 37.1
2016-10-01 36.4
2017-01-01 36.9
2017-04-01 36.0
2017-07-01 34.7
2017-10-01 34.4
2018-01-01 34.5
2018-04-01 34.6