Quarterly Percent
1998-01-01 39.6
1999-01-01 41.6
1999-04-01 40.7
1999-07-01 39.1
1999-10-01 37.5
2000-01-01 41.4
2000-04-01 42.1
2000-07-01 40.8
2000-10-01 40.7
2001-01-01 37.9
2001-04-01 40.9
2001-07-01 40.6
2001-10-01 40.6
2002-01-01 38
2002-04-01 39.9
2002-07-01 40
2002-10-01 40.4
2003-01-01 39.5
2003-04-01 41.2
2003-07-01 40.4
2003-10-01 40.5
2004-01-01 35
2004-04-01 37.7
2004-07-01 36.9
2004-10-01 36.9
2005-01-01 37.4
2005-04-01 38.5
2005-07-01 38.5
2005-10-01 39.7
2006-01-01 41
2006-04-01 42
2006-07-01 42.3
2006-10-01 42.2
2007-01-01 43.3
2007-04-01 46.6
2007-07-01 47.6
2007-10-01 46.3
2008-01-01 49.4
2008-04-01 49.6
2008-07-01 48.2
2008-10-01 48.5
2009-01-01 47.6
2009-04-01 49.5
2009-07-01 49.8
2009-10-01 49.4
2010-01-01 49.2
2010-04-01 50
2010-07-01 50.9
2010-10-01 49.5
2011-01-01 47.5
2011-04-01 48.7
2011-07-01 48.6
2011-10-01 47.9
2012-01-01 47.4
2012-04-01 50.3
2012-07-01 51.5
2012-10-01 51.5
2013-01-01 50.6
2013-04-01 53.4
2013-07-01 53.1
2013-10-01 54.1
2014-01-01 52.5
2014-04-01 55
2014-07-01 54.7
2014-10-01 54.9
2015-01-01 53.2
2015-04-01 53.5
2015-07-01 54.3
2015-10-01 55.3
2016-01-01 56.4
2016-04-01 57.6
2016-07-01 58.3
2016-10-01 58.0
2017-01-01 58.3
2017-04-01 59.9
2017-07-01 60.2
2017-10-01 62.1
2018-01-01 62.3
2018-04-01 63.2