Quarterly Percent
1999-04-01 56.8
2000-01-01 54.2
2000-04-01 58.7
2000-07-01 60.5
2000-10-01 57.3
2001-01-01 52.9
2001-04-01 58.1
2001-07-01 58.9
2001-10-01 56.3
2002-01-01 54.3
2002-04-01 57
2002-07-01 59.6
2002-10-01 56.4
2003-01-01 52.6
2003-04-01 56.1
2003-07-01 56.9
2003-10-01 55
2004-01-01 51.6
2004-04-01 54.9
2004-07-01 57.3
2004-10-01 54.5
2005-01-01 49.7
2005-04-01 53.5
2005-07-01 56.7
2005-10-01 53.8
2006-01-01 50.2
2006-04-01 52.1
2006-07-01 55.5
2006-10-01 51.9
2007-01-01 51
2007-04-01 54.4
2007-07-01 56.9
2007-10-01 55.5
2008-01-01 56.9
2008-04-01 58.9
2008-07-01 58.7
2008-10-01 54.8
2009-01-01 52.5
2009-04-01 54.1
2009-07-01 53.3
2009-10-01 50.4
2010-01-01 50.4
2010-04-01 52.3
2010-07-01 52.3
2010-10-01 50.8
2011-01-01 49
2011-04-01 50.6
2011-07-01 52.6
2011-10-01 51.1
2012-01-01 50.9
2012-04-01 53.1
2012-07-01 53.5
2012-10-01 51.3
2013-01-01 51.6
2013-04-01 52.4
2013-07-01 52.8
2013-10-01 50.4
2014-01-01 48.9
2014-04-01 50.9
2014-07-01 50.9
2014-10-01 49.9
2015-01-01 49.0
2015-04-01 51.4
2015-07-01 52.2
2015-10-01 48.9
2016-01-01 48.1
2016-04-01 48.1
2016-07-01 50.3
2016-10-01 47.4
2017-01-01 46.4
2017-04-01 48.2
2017-07-01 49.9
2017-10-01 48.3
2018-01-01 47.5
2018-04-01 49.5