Quarterly Percent
1999-04-01 46.3
1999-07-01 55.7
1999-10-01 48.7
2000-01-01 47.6
2000-04-01 48.1
2000-07-01 56.8
2000-10-01 49.2
2001-01-01 48.2
2001-04-01 46.8
2001-07-01 54.9
2001-10-01 47.5
2002-01-01 46.3
2002-04-01 44.9
2002-07-01 52.4
2002-10-01 46.6
2003-01-01 45.6
2003-04-01 45.4
2003-07-01 51.9
2003-10-01 47.1
2004-01-01 46.2
2004-04-01 44.8
2004-07-01 52.1
2004-10-01 47.8
2005-01-01 46.8
2005-04-01 46.3
2005-07-01 53.3
2005-10-01 48.4
2006-01-01 47.8
2006-04-01 48.4
2006-07-01 54.6
2006-10-01 50.2
2007-01-01 61.8
2007-04-01 62.3
2007-07-01 66.3
2007-10-01 61.7
2008-01-01 58.6
2008-04-01 58.5
2008-07-01 59.4
2008-10-01 51.8
2009-01-01 47.7
2009-04-01 46.1
2009-07-01 45.3
2009-10-01 42.1
2010-01-01 38.4
2010-04-01 39.2
2010-07-01 40.0
2010-10-01 37.2
2011-01-01 35.8
2011-04-01 36.1
2011-07-01 36.9
2011-10-01 35.8
2012-01-01 33.3
2012-04-01 34.4
2012-07-01 36.7
2012-10-01 34.9
2013-01-01 33.9
2013-04-01 36.2
2013-07-01 39.4
2013-10-01 36.7
2014-01-01 34.0
2014-04-01 35.0
2014-07-01 40.0
2014-10-01 38.2
2015-01-01 35.7
2015-04-01 37.1
2015-07-01 40.8
2015-10-01 37.8
2016-01-01 37.3
2016-04-01 43.0
2016-07-01 45.9
2016-10-01 42.1
2017-01-01 39.6
2017-04-01 41.0
2017-07-01 39.4
2017-10-01 39.9
2018-01-01 37.4
2018-04-01 40.1