Quarterly Percent
1997-01-01 11.6
1997-04-01 10.9
1997-07-01 9.5
1997-10-01 9.4
1998-01-01 10.5
1998-04-01 10.4
1998-07-01 9.2
1998-10-01 9.5
1999-01-01 11.8
1999-04-01 12.9
1999-07-01 12.3
1999-10-01 13
2000-01-01 16.9
2000-04-01 15
2000-07-01 15.3
2000-10-01 16.2
2001-01-01 14.7
2001-04-01 13
2001-07-01 13.5
2001-10-01 13.8
2002-01-01 13.2
2002-04-01 11.3
2002-07-01 10
2002-10-01 14.8
2003-01-01 12.9
2003-04-01 12.1
2003-07-01 9.7
2003-10-01 8.5
2004-01-01 11.4
2004-04-01 11.6
2004-07-01 11.6
2004-10-01 9.8
2005-01-01 11.6
2005-04-01 10.7
2005-07-01 6.8
2005-10-01 7.6
2006-01-01 7.7
2006-04-01 6.2
2006-07-01 5.0
2006-10-01 6.1
2007-01-01 6.7
2007-04-01 5.7
2007-07-01 4.7
2007-10-01 4.5
2008-01-01 3.6
2008-04-01 4.4
2008-07-01 6.9
2008-10-01 8.1
2009-01-01 13.6
2009-04-01 16.6
2009-07-01 16.9
2009-10-01 19.7
2010-01-01 24.8
2010-04-01 22.3
2010-07-01 15.9
2010-10-01 14.1
2011-01-01 15.4
2011-04-01 14
2011-07-01 10.5
2011-10-01 12.4
2012-01-01 12.7
2012-04-01 11.6
2012-07-01 9.5
2012-10-01 9.9
2013-01-01 10.8
2013-04-01 8.1
2013-07-01 8.1
2013-10-01 9.3
2014-01-01 9.4
2014-04-01 7.8
2014-07-01 8.1
2014-10-01 6.1
2015-01-01 7.6
2015-04-01 6.5
2015-07-01 4.7
2015-10-01 6.3
2016-01-01 7.4
2016-04-01 7.6
2016-07-01 7.5
2016-10-01 7.2
2017-01-01 5.9
2017-04-01 7.7
2017-07-01 5.8
2017-10-01 5.3
2018-01-01 7.5
2018-04-01 5.3