Quarterly Percent
1998-01-01 31.9
1998-04-01 29.3
1998-07-01 30.1
1998-10-01 30.8
1999-01-01 31.9
1999-04-01 31.4
1999-07-01 30.9
1999-10-01 32.2
2000-01-01 30.9
2000-04-01 29.2
2000-07-01 28.7
2000-10-01 28
2001-01-01 29
2001-04-01 27.9
2001-07-01 26.9
2001-10-01 28.4
2002-01-01 28.6
2002-04-01 25.8
2002-07-01 25.6
2002-10-01 26.2
2003-01-01 26.7
2003-04-01 25.4
2003-07-01 26.6
2003-10-01 27.9
2004-01-01 28.4
2004-04-01 26.1
2004-07-01 25.2
2004-10-01 26.3
2005-01-01 25.4
2005-04-01 25
2005-07-01 26
2005-10-01 26.7
2006-01-01 25.1
2006-04-01 24.3
2006-07-01 24.2
2006-10-01 26.3
2007-01-01 24.8
2007-04-01 21.7
2007-07-01 21.9
2007-10-01 22.3
2008-01-01 23.2
2008-04-01 20.4
2008-07-01 21.1
2008-10-01 22.8
2009-01-01 25.3
2009-04-01 24.5
2009-07-01 24.7
2009-10-01 28.4
2010-01-01 30.6
2010-04-01 31.4
2010-07-01 32.8
2010-10-01 37.2
2011-01-01 39.9
2011-04-01 43.3
2011-07-01 45.4
2011-10-01 50.2
2012-01-01 52.8
2012-04-01 53.9
2012-07-01 56.6
2012-10-01 57.9
2013-01-01 60
2013-04-01 59.2
2013-07-01 57.1
2013-10-01 56.7
2014-01-01 56.7
2014-04-01 52
2014-07-01 49.5
2014-10-01 51.5
2015-01-01 51.9
2015-04-01 49.5
2015-07-01 48.8
2015-10-01 49.0
2016-01-01 50.9
2016-04-01 49.1
2016-07-01 44.2
2016-10-01 45.2
2017-01-01 46.8
2017-04-01 43.8
2017-07-01 40.1
2017-10-01 43.6
2018-01-01 44.4
2018-04-01 38.8