Quarterly Percent
1999-01-01 41.8
2000-01-01 37.3
2000-04-01 37.4
2000-07-01 37.1
2000-10-01 34.9
2001-01-01 34.4
2001-04-01 36.5
2001-07-01 36
2001-10-01 35.4
2002-01-01 34.6
2002-04-01 34.9
2002-07-01 34.5
2002-10-01 34.2
2003-01-01 34.4
2003-04-01 35.3
2003-07-01 35.8
2003-10-01 35.3
2004-01-01 33.6
2004-04-01 34.3
2004-07-01 34.1
2004-10-01 34.6
2005-01-01 34.2
2005-04-01 35.5
2005-07-01 37
2005-10-01 36.8
2006-01-01 36.8
2006-04-01 37.5
2006-07-01 39.7
2006-10-01 39.6
2007-01-01 39.7
2007-04-01 41.5
2007-07-01 42
2007-10-01 42.5
2008-01-01 42.6
2008-04-01 44.4
2008-07-01 44.6
2008-10-01 44.6
2009-01-01 43.4
2009-04-01 43.3
2009-07-01 45.7
2009-10-01 44.7
2010-01-01 44.3
2010-04-01 44.2
2010-07-01 45.9
2010-10-01 46.5
2011-01-01 46.3
2011-04-01 47.5
2011-07-01 48.9
2011-10-01 48.6
2012-01-01 47.3
2012-04-01 49.3
2012-07-01 50.1
2012-10-01 50.2
2013-01-01 49.4
2013-04-01 50.6
2013-07-01 52.4
2013-10-01 52.8
2014-01-01 51
2014-04-01 52.3
2014-07-01 54.5
2014-10-01 54.7
2015-01-01 52.8
2015-04-01 52.7
2015-07-01 55.2
2015-10-01 55.9
2016-01-01 54.8
2016-04-01 54.4
2016-07-01 55.9
2016-10-01 57.6
2017-01-01 57.0
2017-04-01 57.4
2017-07-01 59.1
2017-10-01 59.7
2018-01-01 57.9
2018-04-01 59.7