Quarterly Percent
1999-04-01 53.2
1999-07-01 41.6
1999-10-01 50.7
2000-01-01 52.7
2000-04-01 53.3
2000-07-01 42.5
2000-10-01 51.2
2001-01-01 53.2
2001-04-01 55.2
2001-07-01 44.1
2001-10-01 52.4
2002-01-01 53.3
2002-04-01 55.4
2002-07-01 45.8
2002-10-01 52.9
2003-01-01 54.4
2003-04-01 54.5
2003-07-01 45.4
2003-10-01 51.9
2004-01-01 53.4
2004-04-01 55.3
2004-07-01 45.8
2004-10-01 50.2
2005-01-01 52.7
2005-04-01 52.4
2005-07-01 44.8
2005-10-01 50.6
2006-01-01 52.4
2006-04-01 51.8
2006-07-01 43.4
2006-10-01 50.1
2007-01-01 38.9
2007-04-01 35.6
2007-07-01 31.7
2007-10-01 37.1
2008-01-01 39.6
2008-04-01 37.3
2008-07-01 34.1
2008-10-01 41.6
2009-01-01 43.1
2009-04-01 40.6
2009-07-01 41.2
2009-10-01 45.6
2010-01-01 51.1
2010-04-01 47.5
2010-07-01 46.5
2010-10-01 48.0
2011-01-01 51.7
2011-04-01 49.7
2011-07-01 50.0
2011-10-01 52.1
2012-01-01 53.2
2012-04-01 50.0
2012-07-01 48.9
2012-10-01 53.3
2013-01-01 55.0
2013-04-01 49.9
2013-07-01 48.5
2013-10-01 54.1
2014-01-01 57.2
2014-04-01 55.0
2014-07-01 49.9
2014-10-01 54.6
2015-01-01 58.1
2015-04-01 56.0
2015-07-01 51.8
2015-10-01 55.8
2016-01-01 58.1
2016-04-01 49.0
2016-07-01 47.8
2016-10-01 51.5
2017-01-01 54.8
2017-04-01 51.9
2017-07-01 54.8
2017-10-01 56.5
2018-01-01 59.3
2018-04-01 54.2