Quarterly Percent
1999-01-01 12.3
1999-04-01 10.8
1999-07-01 10.5
1999-10-01 10.6
2000-01-01 10.5
2000-04-01 9.5
2000-07-01 9.3
2000-10-01 9.4
2001-01-01 8.0
2001-04-01 7.4
2001-07-01 7.3
2001-10-01 7.7
2002-01-01 8.4
2002-04-01 7.9
2002-07-01 8.4
2002-10-01 8.7
2003-01-01 8.8
2003-04-01 8.3
2003-07-01 8.4
2003-10-01 8.6
2004-01-01 8.7
2004-04-01 8.4
2004-07-01 8.2
2004-10-01 7.9
2005-01-01 7.9
2005-04-01 7.5
2005-07-01 6.6
2005-10-01 6.8
2006-01-01 6.9
2006-04-01 6.4
2006-07-01 6.1
2006-10-01 6.2
2007-01-01 6.4
2007-04-01 6.2
2007-07-01 6.3
2007-10-01 6.9
2008-01-01 8.0
2008-04-01 9.1
2008-07-01 10.4
2008-10-01 13
2009-01-01 17
2009-04-01 17.7
2009-07-01 17.7
2009-10-01 18.7
2010-01-01 19.9
2010-04-01 19.7
2010-07-01 19.2
2010-10-01 19.9
2011-01-01 20.7
2011-04-01 20.5
2011-07-01 21
2011-10-01 22.4
2012-01-01 24.1
2012-04-01 24.6
2012-07-01 24.7
2012-10-01 25.6
2013-01-01 26.8
2013-04-01 25.6
2013-07-01 25.3
2013-10-01 25.2
2014-01-01 25.5
2014-04-01 23.8
2014-07-01 22.7
2014-10-01 22.9
2015-01-01 22.9
2015-04-01 21.1
2015-07-01 20.0
2015-10-01 19.6
2016-01-01 19.6
2016-04-01 18.5
2016-07-01 17.5
2016-10-01 17.3
2017-01-01 17.3
2017-04-01 15.8
2017-07-01 14.9
2017-10-01 15.1
2018-01-01 15.3
2018-04-01 13.8
2018-07-01 13.2