Quarterly Percent
1999-01-01 37.3
1999-04-01 38.2
1999-07-01 38.7
1999-10-01 39.6
2000-01-01 40.3
2000-04-01 41.2
2000-07-01 41.6
2000-10-01 42.1
2001-01-01 42.6
2001-04-01 42.8
2001-07-01 43.4
2001-10-01 43.7
2002-01-01 44.2
2002-04-01 45
2002-07-01 45.3
2002-10-01 45.7
2003-01-01 45.8
2003-04-01 46.8
2003-07-01 47.3
2003-10-01 47.8
2004-01-01 47.9
2004-04-01 48.5
2004-07-01 49.2
2004-10-01 49.7
2005-01-01 50.3
2005-04-01 51.9
2005-07-01 52.3
2005-10-01 52.6
2006-01-01 52.8
2006-04-01 53.8
2006-07-01 53.9
2006-10-01 54.5
2007-01-01 54.5
2007-04-01 55.3
2007-07-01 55.5
2007-10-01 55.6
2008-01-01 55.2
2008-04-01 55.7
2008-07-01 55.6
2008-10-01 55
2009-01-01 53.3
2009-04-01 53.3
2009-07-01 53.4
2009-10-01 53
2010-01-01 52.7
2010-04-01 52.6
2010-07-01 52.9
2010-10-01 53
2011-01-01 52.3
2011-04-01 53.4
2011-07-01 52.7
2011-10-01 51.9
2012-01-01 51.4
2012-04-01 51.6
2012-07-01 51.1
2012-10-01 50.5
2013-01-01 49.9
2013-04-01 50.2
2013-07-01 50.5
2013-10-01 50.6
2014-01-01 50.4
2014-04-01 51.3
2014-07-01 51.2
2014-10-01 52
2015-01-01 51.5
2015-04-01 52.7
2015-07-01 53.0
2015-10-01 53.5
2016-01-01 53.3
2016-04-01 54.2
2016-07-01 54.8
2016-10-01 54.9
2017-01-01 54.6
2017-04-01 55.7
2017-07-01 56.1
2017-10-01 56.2
2018-01-01 55.7
2018-04-01 57.0
2018-07-01 57.3