Quarterly Percent
1999-01-01 38.6
1999-04-01 36.4
1999-07-01 35.8
1999-10-01 36.6
2000-01-01 35.1
2000-04-01 35.2
2000-07-01 35.3
2000-10-01 36.2
2001-01-01 36.5
2001-04-01 37.7
2001-07-01 37.7
2001-10-01 39.1
2002-01-01 38.7
2002-04-01 38.1
2002-07-01 39
2002-10-01 40.5
2003-01-01 38.7
2003-04-01 41.1
2003-07-01 42.6
2003-10-01 41.8
2004-01-01 42.1
2004-04-01 42.8
2004-07-01 44.9
2004-10-01 45.4
2005-01-01 45.8
2005-04-01 47
2005-07-01 49
2005-10-01 49.2
2006-01-01 49.3
2006-04-01 48.7
2006-07-01 50.6
2006-10-01 50.4
2007-01-01 50.8
2007-04-01 51.6
2007-07-01 54
2007-10-01 53.6
2008-01-01 54.6
2008-04-01 55.6
2008-07-01 58.4
2008-10-01 58
2009-01-01 55.7
2009-04-01 54.9
2009-07-01 55.3
2009-10-01 53.8
2010-01-01 54.4
2010-04-01 54.9
2010-07-01 54.2
2010-10-01 52.6
2011-01-01 51.9
2011-04-01 52.5
2011-07-01 53.2
2011-10-01 52.2
2012-01-01 52.3
2012-04-01 54.2
2012-07-01 53.4
2012-10-01 54.8
2013-01-01 53.9
2013-04-01 53.6
2013-07-01 53.7
2013-10-01 51.9
2014-01-01 51.2
2014-04-01 53.1
2014-07-01 54.5
2014-10-01 53.8
2015-01-01 53.2
2015-04-01 53.2
2015-07-01 53.8
2015-10-01 54.1
2016-01-01 54.3
2016-04-01 55.5
2016-07-01 55.0
2016-10-01 55.5
2017-01-01 55.5
2017-04-01 56.1
2017-07-01 57.3
2017-10-01 57.6
2018-01-01 58.4
2018-04-01 57.5