Quarterly Percent
1998-01-01 37.2
1998-04-01 37.5
1998-07-01 36.7
1998-10-01 37.2
1999-01-01 37.4
1999-04-01 37.6
1999-07-01 37.5
1999-10-01 37.7
2000-01-01 36.8
2000-04-01 36.1
2000-07-01 36.3
2000-10-01 35.9
2001-01-01 36.3
2001-04-01 36.9
2001-07-01 37.2
2001-10-01 37.9
2002-01-01 39.5
2002-04-01 40.3
2002-07-01 41.5
2002-10-01 41.7
2003-01-01 42
2003-04-01 42.3
2003-07-01 42.8
2003-10-01 41.9
2004-01-01 42.5
2004-04-01 42.5
2004-07-01 42.9
2004-10-01 42.8
2005-01-01 44
2005-04-01 44.2
2005-07-01 45.2
2005-10-01 44.5
2006-01-01 45.4
2006-04-01 45.4
2006-07-01 45.3
2006-10-01 44.7
2007-01-01 45.3
2007-04-01 45.8
2007-07-01 46.4
2007-10-01 46.5
2008-01-01 47.1
2008-04-01 47.8
2008-07-01 47.5
2008-10-01 48
2009-01-01 47.8
2009-04-01 47.4
2009-07-01 46.4
2009-10-01 45.8
2010-01-01 46
2010-04-01 46.3
2010-07-01 46.5
2010-10-01 47.2
2011-01-01 47.3
2011-04-01 48.2
2011-07-01 47.8
2011-10-01 47.4
2012-01-01 47.5
2012-04-01 49.1
2012-07-01 50.4
2012-10-01 50.3
2013-01-01 50.3
2013-04-01 51.4
2013-07-01 52.2
2013-10-01 52.6
2014-01-01 52.7
2014-04-01 53.6
2014-07-01 54.7
2014-10-01 55
2015-01-01 54.5
2015-04-01 55.6
2015-07-01 55.9
2015-10-01 55.8
2016-01-01 56.5
2016-04-01 58.2
2016-07-01 59.0
2016-10-01 60.4
2017-01-01 60.9
2017-04-01 61.6
2017-07-01 62.6
2017-10-01 63.4
2018-01-01 64.4
2018-04-01 65.1