Quarterly Percent
1999-01-01 30
1999-04-01 30.8
1999-07-01 34.1
1999-10-01 33.6
2000-01-01 33.3
2000-04-01 33.3
2000-07-01 34.5
2000-10-01 34
2001-01-01 34.8
2001-04-01 34.5
2001-07-01 37.4
2001-10-01 36.1
2002-01-01 35.1
2002-04-01 36.3
2002-07-01 35.6
2002-10-01 35
2003-01-01 31.8
2003-04-01 30.7
2003-07-01 33.8
2003-10-01 30.5
2004-01-01 30.8
2004-04-01 30.4
2004-07-01 32.1
2004-10-01 30.9
2005-01-01 30
2005-04-01 26.4
2005-07-01 30.3
2005-10-01 28.4
2006-01-01 28.8
2006-04-01 26.4
2006-07-01 28.8
2006-10-01 23.8
2007-01-01 19.2
2007-04-01 17.1
2007-07-01 22.8
2007-10-01 21.7
2008-01-01 19.3
2008-04-01 17.8
2008-07-01 21.8
2008-10-01 20.5
2009-01-01 22.8
2009-04-01 22.8
2009-07-01 29.7
2009-10-01 30.1
2010-01-01 31
2010-04-01 30.3
2010-07-01 33
2010-10-01 33.4
2011-01-01 32.6
2011-04-01 31.5
2011-07-01 35.3
2011-10-01 35.8
2012-01-01 31.5
2012-04-01 29.7
2012-07-01 34.5
2012-10-01 34.1
2013-01-01 28.1
2013-04-01 30
2013-07-01 34.6
2013-10-01 33.8
2014-01-01 32.6
2014-04-01 31.8
2014-07-01 30.5
2014-10-01 25.6
2015-01-01 26.1
2015-04-01 26.0
2015-07-01 29.1
2015-10-01 28.8
2016-01-01 27.4
2016-04-01 25.7
2016-07-01 27.1
2016-10-01 25.2
2017-01-01 20.7
2017-04-01 17.4
2017-07-01 20.6
2017-10-01 22.0
2018-01-01 16.5
2018-04-01 15.6
