Quarterly Percent
1998-01-01 24.0
1998-04-01 24.3
1998-07-01 23.3
1998-10-01 24.2
1999-01-01 24.5
1999-04-01 24.8
1999-07-01 24
1999-10-01 24.4
2000-01-01 24.4
2000-04-01 23.3
2000-07-01 23.5
2000-10-01 23.4
2001-01-01 24.1
2001-04-01 24.2
2001-07-01 24.9
2001-10-01 25.1
2002-01-01 26.5
2002-04-01 27.1
2002-07-01 27.5
2002-10-01 27.7
2003-01-01 28.9
2003-04-01 30.4
2003-07-01 30.7
2003-10-01 29.8
2004-01-01 31.4
2004-04-01 31.5
2004-07-01 31.3
2004-10-01 31.1
2005-01-01 32.3
2005-04-01 32.7
2005-07-01 33.7
2005-10-01 33.2
2006-01-01 34.2
2006-04-01 34.4
2006-07-01 34
2006-10-01 33.4
2007-01-01 34.7
2007-04-01 35.5
2007-07-01 35.2
2007-10-01 35.4
2008-01-01 35.9
2008-04-01 36.5
2008-07-01 35.5
2008-10-01 36.5
2009-01-01 37.3
2009-04-01 37.5
2009-07-01 37.3
2009-10-01 36.6
2010-01-01 37.8
2010-04-01 37.8
2010-07-01 37.4
2010-10-01 38.8
2011-01-01 39.6
2011-04-01 39.3
2011-07-01 39.3
2011-10-01 39.4
2012-01-01 39.8
2012-04-01 41.2
2012-07-01 42
2012-10-01 43.2
2013-01-01 43.4
2013-04-01 43.7
2013-07-01 44.5
2013-10-01 45.3
2014-01-01 45.8
2014-04-01 45.7
2014-07-01 46.9
2014-10-01 47
2015-01-01 47.7
2015-04-01 48.4
2015-07-01 48.6
2015-10-01 48.3
2016-01-01 49.7
2016-04-01 50.8
2016-07-01 51.4
2016-10-01 53.0
2017-01-01 54.2
2017-04-01 53.6
2017-07-01 54.9
2017-10-01 55.5
2018-01-01 57.1
2018-04-01 57.7